Inverness Caledonian Thistle booked a place in the quarter-finals of the Scottish Cup with a handsome victory over Morton.
Richie Foran slotted home Caley's opener and then set up Adam Rooney to fire home the second before half time.
Headed goals from debutant Chris Hogg and Rooney put Inverness further ahead.
Derek Lyle pulled one back for the visitors, but Foran soon grabbed his second of the day, firing in to round off the home side's win.
Inverness will discover who they will meet in the next round when the draw is made on Sunday.
First Division Morton were first to threaten, Allan Jenkins bursting down the inside left channel and blasting in a shot that Jonny Tuffey could only palm away before his defence mopped up the danger.
Inverness slowly began to take a grip of the game and Russell Duncan's powerful drive was blocked by his own team-mate, Aaron Doran, letting Morton off the hook.
The hosts moved ahead when Rooney intelligently ushered the ball into the path of Foran, who side-footed home from just inside the box.
Another Duncan piledriver brought out the best in goalkeeper Colin Stewart as the visitors avoided losing a quick second.
Rooney chased a long ball and managed to round Stewart before crossing into the area, but Foran mis-hit his attempted volley and Eric Odhiambo's follow-up shot was deflected wide.
Michael Tidser's free-kick shot was easily collected by Tuffey seconds before the Highlanders stretched their lead with Foran returning the favour by setting up Rooney.
Foran beat the offside trap by getting in behind the Morton defence and squared for Rooney to sweep the ball in off the post.
Lee Cox curled a shot wide of the Morton goal as Inverness continued to impose themselves.
Brian Graham found a yard of space inside the Caley Thistle box and fired the ball across, but Inverness's transfer deadline day signing Hogg blocked well.
Morton manager Allan Moore made a double substitution at the changeover, with Carlo Monti and Peter Weatherson coming on for David O'Brien and Graham.
But the alterations did not spark the revival the travelling fans were hoping for and it was an Inverness replacement, Dani Sanchez, who was instrumental in carving out the next goal.
Sanchez, who came on for Odhiambo, crossed for Foran, but the challenge of Marc Smyth gave Morton a temporary reprieve.
However, from the resulting corner, Doran played a short ball to Sanchez, who crossed for Foran to loop a header into the bottom right corner.
Inverness were playing with more and more fluency and Doran raced away on the left to cross for Rooney to nod home.
Sanchez's substitute appearance was cut short when he himself was replaced because of a hand injury, David Proctor coming on.
Doran cut inside and swerved in a shot that forced Stewart to punch away.
Rooney had an excellent chance to claim his third when he was teed up for a tap-in inside the six-yard box, but the striker fluffed his shot and allowed Morton to clear.
Foran then burst through the Morton defence and cut back to make space for a left-foot shot that was just beyond the far post.
Lyle lifted a shot over before finding more success with his next attempt, brushing off the challenge of Hogg to tuck home Morton's consolation strike.
However, Inverness re-established their four-goal advantage when Proctor advanced down the right and crossed for Foran to slam home.
Live text and stats
Saturday, 5 February 2011
07 Odhiambo (Sanchez 59) (Proctor 74)
10 Rooney (MacDonald 82)
03 McKinlay yellow card
11 O'Brian (Monti 45)
07 Kean (Bachirou 76)
10 Graham (Weatherson 45)
Ref: CharlestonAtt: 1,893
Attempts on target
Attempts off target
92:29 The referee signals the end of the game.
90:00+1:57 Corner from the right by-line taken by Carlo Monti, save by Jonny Tuffey.
85:11 Lee Cox provided the assist for the goal.
85:11 GOAL - Richie Foran:Inverness CT 5 - 1 Morton Richie Foran grabs a goal from inside the penalty box to the bottom right corner of the goal. Inverness CT 5-1 Morton.
82:23 Assist by Allan Jenkins.
82:23 GOAL - Derek Lyle:Inverness CT 4 - 1 Morton Derek Lyle finds the net with a goal from inside the penalty area to the bottom left corner of the goal. Inverness CT 4-1
81:36 Substitution Alex MacDonald comes on in place of Adam Rooney.
79:38 Effort from the edge of the box by Richie Foran goes wide of the left-hand post.
76:14 Inswinging corner taken from the right by-line by Carlo Monti.
75:29 Substitution Fouad Bachirou is brought on as a substitute for Stewart Kean.
73:28 Substitution (Inverness CT) makes a substitution, with David Proctor coming on for Dani Sanchez.
70:34 Aaron Doran takes a shot. Save made by Colin Stewart.
67:00 Dani Sanchez is penalised for a handball. Direct free kick taken by Michael Tidser.
65:07 Assist by Aaron Doran.
65:07 GOAL - Adam Rooney:Inverness CT 4 - 0 Morton Adam Rooney finds the back of the net with a headed goal from inside the six-yard box. Inverness CT 4-0 Morton.
63:29 Inswinging corner taken by Michael Tidser.
Correction - 61:24 The assist for the goal came from Dani Sanchez.
61:24 Assist on the goal came from Graeme Shinnie.
61:24 GOAL - Chris Hogg:Inverness CT 3 - 0 Morton Chris Hogg scores a headed goal from deep inside the penalty area. Inverness CT 3-0 Morton.
60:52 Short corner taken by Aaron Doran.
58:42 Substitution Dani Sanchez comes on in place of Eric Odhiambo.
57:47 Corner taken by Aaron Doran.
57:13 Corner taken by Aaron Doran from the left by-line.
54:49 The assistant referee signals for offside against Adam Rooney. Indirect free kick taken by Colin Stewart.
50:56 Shot from long range by Peter Weatherson misses to the right of the goal.
47:03 Peter Weatherson produces a cross. Allan Jenkins takes a outswinging corner.
46:31 Adam Rooney takes a shot. Stuart McCaffrey gets a block in.
45:01 The referee starts the second half.
45:00+1:54 The players leave the pitch at half time.
45:00+0:43 Brian Graham takes a shot. Chris Hogg gets a block in.
45:00 Substitution Brian Graham goes off and Peter Weatherson comes on.
45:00 Substitution David O'Brien leaves the field to be replaced by Carlo Monti.
42:13 Richie Foran is caught offside. Colin Stewart restarts play with the free kick.
41:01 Outswinging corner taken from the right by-line by Aaron Doran.
39:50 Lee Cox fouled by Kevin McKinlay, the ref awards a free kick. Stuart Duff takes the direct free kick, Lee Cox produces a right-footed
shot from outside the penalty box and misses right.
39:50 Booking Booking for Kevin McKinlay.
37:53 Richie Foran provided the assist for the goal.
37:53 GOAL - Adam Rooney:Inverness CT 2 - 0 Morton Adam Rooney finds the back of the net with a goal from inside the penalty box to the bottom left corner of the goal. Inverness
CT 2-0 Morton.
36:51 Unfair challenge on Kevin McKinlay by Adam Rooney results in a free kick. Free kick crossed left-footed by Michael Tidser
from right channel, save by Jonny Tuffey.
34:28 Stuart Duff fouled by Brian Graham, the ref awards a free kick. Free kick crossed right-footed by Aaron Doran, Marc Smyth
makes a clearance.
31:33 Aaron Doran fouled by Kevin McKinlay, the ref awards a free kick. Aaron Doran crosses the ball in from the free kick, clearance
by Marc Smyth. Inswinging corner taken by Aaron Doran. Inswinging corner taken by Aaron Doran from the right by-line, Colin
Stewart makes a save.
30:04 Outswinging corner taken from the right by-line by Aaron Doran.
Correction - 24:22 Richie Foran takes a shot. Save by Colin Stewart.
24:22 Richie Foran takes a shot. Clearance made by Colin Stewart.
23:39 A cross is delivered by Eric Odhiambo, clearance by Marc Smyth.
21:50 The referee blows for offside against Richie Foran. Colin Stewart takes the direct free kick.
19:54 Russell Duncan takes a shot. Save by Colin Stewart.
18:48 Adam Rooney provided the assist for the goal.
18:48 GOAL - Richie Foran:Inverness CT 1 - 0 Morton Richie Foran gets on the score sheet with a goal from just inside the penalty area to the bottom right corner of the goal.
Inverness CT 1-0 Morton.
18:23 Aaron Doran sends in a cross, Marc Smyth manages to make a clearance.
16:06 Adam Rooney takes a shot. Blocked by Michael Tidser.
14:28 Effort on goal by Lee Cox from outside the box goes harmlessly over the bar.
13:06 Aaron Doran takes a inswinging corner to the near post, clearance made by Stuart McCaffrey. Inswinging corner taken by Aaron
Doran from the left by-line played to the near post.
4:53 Adam Rooney takes a short corner, Marc Smyth manages to make a clearance. Aaron Doran takes a inswinging corner.
1:10 Derek Lyle takes a shot.
0:00 The match has kicked off.
Live text and data provided by The Press Association.
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