Koscielny's goal was followed by a defensive mistake which allowed Bolton to level
By Pranav Soneji
Arsenal celebrated their 1000th goal of Arsene Wenger's managerial reign with a confident win against 10-man Bolton.
Laurent Koscielny put Arsenal in front in the 24th minute but the Frenchman's defensive error allowed Johan Elmander to level a minute before half-time.
But Arsenal turned on the style as Maroune Chamakh headed in the first of three second-half goals from six yards.
Defender Gary Cahill was sent off for a dangerous tackle before Alex Song and Carlos Vela completed the rout.
Even without injured duo Theo Walcott and Robin van Persie, Wenger's side had sufficient depth and attacking options to create numerous goal-scoring opportunities for their third victory of the season as well as inflicting Bolton's first defeat of the campaign.
A consistent performance from £6m signing Sebastien Squillaci on his debut will give Wenger plenty of encouragement with Thomas Vermaelen unavailable because of an Achilles tendon injury.
However, furious Trotters boss Owen Coyle confronted referee Stuart Attwell at the final whistle in protest at the straight red card shown to central defender Cahill in the 64th minute for a clumsy challenge on Chamakh.
Wenger pleased with Arsenal strength
The incident, only the second sending off of Cahill's career, allowed Arsenal to consolidate their lead as their influential midfield killed off the match in the final 20 minutes.
Coyle, who suffered two successive losses to the Gunners in three days after taking over at the Reebok Stadium at the start of the year, was without the suspended Jussi Jaaskelainen in goal, so goalkeeper Adam Bogdan made his first Premier League start.
And the young Hungarian was pressed into action within the first 10 minutes as Tomas Rosicky's right boot carved open Bolton's defence like a skilled surgeon, allowing Andrei Arshavin a one-on-one with the keeper.
But the flame-haired Bogdan made a fine save racing off his line, thwarting the Russian from the edge of the penalty area and clearing the ball - via his left leg - for a corner.
The early opportunity set the first-half tempo as the Gunners dominated possession in midfield, with Cesc Fabregas and Rosicky in particular looking to open up the visitors' nervy back-four.
But it was midfielder Jack Wilshere - who spent 14 games on loan at the Reebok Stadium last season - who instigated the move which gave the home side the lead in the 24th minute.
The teenager's left-footed cross caused pandemonium in the visitors' box, allowing the resourceful Chamakh to square the ball at the back post for Koscielny to tap in from close range - via a second deflection off the sprawling Bogdan.
Bolton's presence in Arsenal's box had been restricted to set-piece sojourns, with the muscular Elmander and Kevin Davies starved of any service from midfield.
Only an inch-perfect sliding tackle from Gretar Steinsson denied Russia international Arshavin the opportunity to double the lead.
But despite their slick passing and conspicuous movement, Arsenal were undone by a goal in complete contrast to their intricacy, carved out from route one simplicity and incompetent defending a minute before half time.
A booming goal-kick was headed on by Davies and into the aerial territory of Koscielny.
But rather than clear to safety, the Frenchman managed to wrong-foot defensive partner Squillaci and head the ball into the path of Lee Chong-yong inside the Arsenal penalty area.
The South Korea international admirably kept his composure at the bye-line, sending over a perfect right-footed cross for Elmander to head in from six yards for his third goal of the season.
But despite the defensive aberration, Arsenal continued to press in the second half as yet another precise through ball allowed Chamakh a one-on-one with only Bogdan to beat.
But the keeper made a superb one-handed save as the Morocco international lashed a stinging right-footed drive from the edge of the area.
Referee decisions cost us dear - Coyle
But Chamakh had the ball in the net 30 seconds later from the resulting corner, heading in Fabregas's bye-line cross from the edge of the six-yard box for his second goal for the Gunners - and the 1000th in Wenger's career at Highbury and The Emirates.
With Arsenal applying a vice-like grip in midfield, Bolton's increasingly stretched defence was further hindered when Cahill was shown a straight red card for a dangerous tackle on Chamakh.
Substitute Andy O'Brien's influence in defence was negligible as Arsenal continued to dominate possession, each pass greeted by a chorus of "oles" by the baying Gunners faithful.
Midfielder Song netted the third from an acute angle, delicately lifting the ball over the onrushing Bogdan in the 78th minute.
And substitute Vela, on as a replacement for Arshavin, completed the rout when he smashed in the fourth from the edge of the area with Bolton's defence nowhere in sight seven minutes from full-time.
90:00+4:28 Francesc Fabregas takes a short corner.
90:00+2:56 Free kick awarded for an unfair challenge on Stuart Holden by Alex Song. Direct free kick taken by Gretar Rafn Steinsson.
90:00+0:25 The assistant referee signals for offside against Andrey Arshavin. Indirect free kick taken by Adam Bogdan.
90:00 The final whistle is blown by the referee.
88:33 Unfair challenge on Kevin Davies by Kieran Gibbs results in a free kick. Andrew O'Brien takes the free kick.
87:20 Free kick awarded for an unfair challenge on Andrey Arshavin by Matthew Taylor. Free kick taken by Francesc Fabregas.
87:02 Kieran Gibbs takes a shot. Zat Knight gets a block in.
86:48 Alex Song takes a shot. Blocked by Fabrice Muamba.
85:53 Free kick awarded for a foul by Neves Denilson on Stuart Holden. Paul Robinson takes the free kick.
85:22 Free kick awarded for an unfair challenge on Sebastien Squillaci by Kevin Davies. Sebastien Squillaci takes the direct free
83:31 Shot from just outside the box by Francesc Fabregas misses to the left of the target.
82:16 Assist by Francesc Fabregas.
82:16 GOAL - Carlos Alberto Vela:Arsenal 4 - 1 Bolton Carlos Alberto Vela scores a goal from inside the area to the bottom left corner of the goal. Arsenal 4-1 Bolton.
79:09 Substitution Matthew Taylor on for Chung-Yong Lee.
79:09 Substitution Johan Elmander leaves the field to be replaced by Robbie Blake.
79:09 Substitution Marouane Chamakh goes off and Carlos Alberto Vela comes on.
79:09 Shot from 20 yards by Neves Denilson. Save by Adam Bogdan. Francesc Fabregas decides to take a short corner. Headed effort
from inside the area by Sebastien Squillaci misses to the left of the target.
77:02 Assist on the goal came from Andrey Arshavin.
77:02 GOAL - Alex Song:Arsenal 3 - 1 Bolton Alex Song grabs a goal from close in low into the middle of the goal. Arsenal 3-1 Bolton.
76:12 Tomas Rosicky produces a drilled right-footed shot from deep inside the penalty area which goes wide of the left-hand post.
75:45 Free kick awarded for an unfair challenge on Neves Denilson by Fabrice Muamba. Laurent Koscielny restarts play with the free
72:52 Francesc Fabregas takes a shot from deep inside the box clearing the bar.
72:04 Free kick awarded for an unfair challenge on Stuart Holden by Alex Song. Direct free kick taken by Stuart Holden.
70:41 Substitution Vassiriki Diaby goes off and Neves Denilson comes on.
70:41 Johan Elmander has an effort at goal. Blocked by Francesc Fabregas. Outswinging corner taken right-footed by Stuart Holden,
Zat Knight produces a header from inside the area that goes over the crossbar.
69:37 Chung-Yong Lee takes a shot. Save made by Manuel Almunia.
65:39 Substitution Andrew O'Brien joins the action as a substitute, replacing Martin Petrov.
65:18 Alex Song produces a header from deep inside the six-yard box that clears the crossbar.
63:21 Free kick taken by Francesc Fabregas.
63:21 Sent off Gary Cahill is shown a red card for serious foul play.
63:02 Foul by Gary Cahill on Marouane Chamakh, free kick awarded.
62:17 Alex Song gives away a free kick for an unfair challenge on Chung-Yong Lee. Direct free kick taken by Gary Cahill.
61:02 Free kick taken by Manuel Almunia.
61:02 Booking Booking for Emmanuel Eboue.
60:54 Foul by Kevin Davies on Laurent Koscielny, free kick awarded.
58:06 Substitution Vassiriki Diaby comes on in place of Jack Wilshere.
57:08 Assist on the goal came from Francesc Fabregas.
57:08 GOAL - Marouane Chamakh:Arsenal 2 - 1 Bolton Marouane Chamakh scores a headed goal from close range. Arsenal 2-1 Bolton.
56:58 Corner taken by Francesc Fabregas played to the near post.
56:41 Francesc Fabregas takes a inswinging corner from the left by-line played to the near post.
56:23 Shot from 18 yards from Marouane Chamakh. Save by Adam Bogdan.
56:08 Chung-Yong Lee is caught offside. Indirect free kick taken by Manuel Almunia.
55:26 Corner taken by Martin Petrov played to the near post, clearance made by Francesc Fabregas.
53:50 The assistant referee signals for offside against Andrey Arshavin. Adam Bogdan restarts play with the free kick.
Correction - 53:03 The official flags Andrey Arshavin offside. Adam Bogdan takes the free kick.
53:03 The assistant referee signals for offside against Johan Elmander. Free kick taken by Manuel Almunia.
52:20 Kieran Gibbs takes the direct free kick.
52:20 Booking Gretar Rafn Steinsson receives a caution for unsporting behaviour.
52:17 Foul by Gretar Rafn Steinsson on Jack Wilshere, free kick awarded.
50:40 Andrey Arshavin is ruled offside. Free kick taken by Adam Bogdan.
46:13 Martin Petrov takes a inswinging corner from the right by-line played to the near post.
45:01 The referee starts the second half.
45:00+0:31 Foul by Laurent Koscielny on Kevin Davies, free kick awarded. Stuart Holden crosses the ball from the free kick right-footed
from right wing, save by Manuel Almunia.
45:00+0:08 Francesc Fabregas takes a shot. Save by Adam Bogdan.
45:00 The players leave the pitch at half time.
43:35 Chung-Yong Lee provided the assist for the goal.
43:35 GOAL - Johan Elmander:Arsenal 1 - 1 Bolton Johan Elmander grabs a headed goal from close in. Arsenal 1-1 Bolton.
41:14 Effort on goal by Andrey Arshavin from deep inside the penalty area misses to the right of the target.
38:10 Free kick awarded for a foul by Fabrice Muamba on Francesc Fabregas. Francesc Fabregas restarts play with the free kick.
Correction - 36:03 Martin Petrov delivers the ball from the free kick left-footed from right wing, clearance by Laurent Koscielny. Marouane Chamakh
concedes a free kick for a foul on Gretar Rafn Steinsson. Gretar Rafn Steinsson restarts play with the free kick.
36:03 Martin Petrov crosses the ball in from the free kick, Laurent Koscielny makes a clearance. Unfair challenge on Gretar Rafn
Steinsson by Marouane Chamakh results in a free kick. Gretar Rafn Steinsson restarts play with the free kick.
36:03 Booking Kieran Gibbs receives a yellow card.
Correction - 35:15 Johan Elmander takes a shot. Save made by Manuel Almunia. Martin Petrov takes a inswinging corner to the near post. Martin
Petrov fouled by Kieran Gibbs, the ref awards a free kick.
35:15 Johan Elmander takes a shot. Save by Manuel Almunia. Inswinging corner taken left-footed by Martin Petrov played to the near
post. Unfair challenge on Martin Petrov by Kieran Gibbs results in a free kick.
34:46 Corner taken by Martin Petrov played to the near post.
31:08 Shot by Andrey Arshavin from deep inside the penalty area misses to the right of the target.
29:52 Tomas Rosicky takes a shot. Adam Bogdan makes a save.
26:30 Francesc Fabregas takes a shot. Save by Adam Bogdan.
25:57 Andrey Arshavin is caught offside. Free kick taken by Gary Cahill.
23:25 GOAL - Laurent Koscielny:Arsenal 1 - 0 Bolton Laurent Koscielny scores a goal from inside the six-yard box to the bottom left corner of the goal. Arsenal 1-0 Bolton.
23:20 Laurent Koscielny takes a shot. Save made by Adam Bogdan.
22:36 Corner from the left by-line taken by Francesc Fabregas, Gary Cahill manages to make a clearance.
20:45 Francesc Fabregas takes the inswinging corner, Sebastien Squillaci challenges Zat Knight unfairly and gives away a free kick.
Free kick taken by Adam Bogdan.
20:12 Inswinging corner taken right-footed by Francesc Fabregas from the left by-line, clearance made by Zat Knight.
17:15 Francesc Fabregas takes the direct free kick.
17:15 Booking Kevin Davies goes into the referee's book for unsporting behaviour.
17:06 Kevin Davies concedes a free kick for a foul on Jack Wilshere.
13:37 Outswinging corner taken right-footed by Stuart Holden played to the near post, Francesc Fabregas makes a clearance.
11:17 Kevin Davies has an effort at goal. Save by Manuel Almunia.
10:46 Free kick awarded for an unfair challenge on Kevin Davies by Sebastien Squillaci. Free kick taken by Stuart Holden.
10:14 Effort on goal by Tomas Rosicky from just inside the penalty area goes over the target.
8:37 Free kick awarded for an unfair challenge on Francesc Fabregas by Johan Elmander. Free kick taken by Francesc Fabregas.
7:39 Free kick awarded for a foul by Gretar Rafn Steinsson on Kieran Gibbs. Manuel Almunia restarts play with the free kick.
5:18 Free kick awarded for an unfair challenge on Kevin Davies by Emmanuel Eboue. Shot comes in from Martin Petrov from the free
4:25 Corner taken by Francesc Fabregas from the left by-line, Sebastien Squillaci has a header from deep inside the six-yard box
and clears the crossbar.
4:11 Andrey Arshavin takes a shot. Adam Bogdan makes a save.
3:01 Inswinging corner taken from the right by-line by Jack Wilshere, Adam Bogdan makes a save.
2:39 Francesc Fabregas takes a shot. Zat Knight gets a block in.
1:31 Fabrice Muamba gives away a free kick for an unfair challenge on Francesc Fabregas. Direct free kick taken by Laurent Koscielny.
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