Martin Kaymer's quest to claim a first Commercial Bank Qatar Masters title continued as he carded a five-under-par 67 to share the second-round clubhouse lead at nine-under with Australian Martin Fraser, who also signed for the same score after the morning rounds.
George Coetzee of South Africa and Felipe Aguilar of Chile also carded 67 to lie one shot back at eight-under.
Kaymer, who memorably holed the putt that ensured Europe's retention of the Ryder Cup last September, teed off on hole 10 as he played in the morning's marquee group with Justin Rose and Louis Oosthuizen, ranked fourth and fifth in the world respectively.
The German, a former World Number One, birdied holes 13, 17 and 18 before picking up further shots on five and eight.
"I played a lot better than the last few rounds I played, especially in Abu Dhabi. But I was a little fortunate today with a few putts that dropped, although on those greens that happens sometimes. I think nine‑under is a good position to be in," said Kaymer, who is looking to add to his 10 European Tour titles.
"It was good to play with Justin and Louis, as we had a good time, so now we look forward to the weekend."
Rose was also moving nicely with two birdies on the back nine, but bogeys on one and six set him back before a birdie at eight helped him to a 71 and left him at five-under. Oosthuizen was a shot back after a 69 featuring five birdies and back-to-back bogeys at five and six.