THIRD ROUND LEADERBOARD:
-11 MA Jimenez (Sp), L Westwood (Eng), T Jaidee (Tha), A Quiros (Sp)
-9 R McIlroy (NI) -8 M Fraser (Aus), E Molinari (It)
Selected others: -6 P Casey (Eng), G McDowell (NI) -5 S Gallacher (Sco) -4 R Fisher (Eng)
-3 D Clarke (NI) -2 T Watson (US)
Westwood tees off at the 8th at the Emirates Club
European number one Lee Westwood carded a 68 to make it a four-way tie for the lead going into the final round of the Dubai Desert Classic.
Westwood carded four birdies on the back nine to join Miguel Angel Jimenez, Alvaro Quiros and overnight leader Thongchai Jaidee on 11 under.
Jaidee led by three shots at one stage but the chasing pack closed in as he parred his way down the back nine.
Defending champion Rory McIlroy of Northern Ireland is on nine under par.
Jaidee led by one shot going into the third day and soon extended his advantage with birdies at the 3rd, 8th and 9th.
But the 40-year-old could not add to his birdie total and the other three players made their move.
The big-hitting Quiros, playing with Tom Watson, was the first to reach Jaidee with four birdies down the back nine - including the last two holes - for a 67.
Westwood, searching for his first win of the season, then went on the attack to match the total while Jimenez made it a four-way tie after missing a 15-foot birdie putt at the last which would have given him the outright lead.
"I'm in contention and that gets me buzzing and excited," said Westwood. "That's why you practice.
"You put in the hard work to try to get into contention and win tournaments and prove yourself under pressure.
"Also, my equipment is more in order this week. This time last week, I was just off the lead but with no driver. So I'm feeling a lot better."
Jaidee, a former Thai paratrooper, said he was not too bothered about losing the lead at the Emirates Club.
"No, I am not disappointed to have finished with the outright lead as in golf you never know," he said.
"I made pars and didn't make bogeys, so that is fine. Tomorrow is one more day and I am very close. So maybe I have a good chance tomorrow of winning."
McIlroy, who beat Justin Rose in Dubai last year to win his first professional tournament, bogeyed the 1st but stayed in contention with four birdies, including one at the last.
England's Paul Casey is with Graeme McDowell of Northern Ireland on six under, Stephen Gallacher is five under, Ross Fisher is four under, while Darren Clarke is a shot further back.