Rafa Cabrera-Bello of Spain has squandered a two-shot lead in finishing tied with England's Steve Webster on top of the leaderboard after the Qatar Masters third round.
Cabrera-Bello shot a 1-over-par 73 to Webster's 70 for them to lead by one at Doha Golf Club on Friday.
Adrien Saddier of France was the biggest mover with six birdies in his opening eight holes in a round of 64 to be tied in third place with South African Thomas Aiken (70) and Denmark's Thorbjorn Olesen (68) on 11 under.
Scotland's Paul Lawrie (69) is just one shot further back on 10 under, and looking to become the first three-time Qatar champion.
Sergio Garcia is three shots back after a 69.