(CNN) -- Paul Casey will take a four-stroke lead over Martin Kaymer going into the final round of the Abu Dhabi Championship, as the last two winners of the tournament go head-to-head for the title on Sunday.
Casey is on course for a second Abu Dhabi victory in three years after a third round 63 on Saturday.
Last year, Kaymer was six shots clear with a round to go, but this time the 24-year-old German looks to have a mountain to climb as he attempts to overturn the Englishman's advantage.
Casey's bid bid to end two full years without a tournament victory -- although he has had no fewer than 15 top-10 finishes in that time -- saw him come within a stroke of the course record with a dazzling nine-under-par third round 63.
The 2007 champion lies on 19-under-par after 54-holes, with Kaymer (65) leading the chasing pack and joint halfway leader Graeme Storm (69) one shot further back.
British Open and US PGA champion Padraig Harrington had a 68, but now finds himself eight behind, while world number two Sergio Garcia is 11 shots adrift after a 67.
Casey followed up his 65 on Friday with two birdies straightaway, then picked up further strokes on the seventh and long eighth to turn in 32.
He was in trouble off the tee at the par-five 10th, but a 40-footer was a real bonus and more birdies on the 12th, 13th and 17th put him in full command of the event before he almost pitched in for eagle at the last.
Casey told PA Sport: "Something just clicked. A good night's sleep seemed to cure the ball-striking ills. That was a lot of fun.
"I have not had a 63 in a long time. I just really like this course. I have fun when I'm walking round -- but I am not putting pressure on myself because it's early in the season," he added.
However, it was a day to forget for Australian Richard Green, who topped the leaderboard with Storm after 36 holes. He managed only a 76 to fall right out of contention.