Spain's Sergio Garcia hit a round of 66 to form part of a four-way tie at the top of the leaderboard at the halfway stage of the Qatar Masters in Doha.
Garcia's Ryder Cup team-mate, Germany's Martin Kaymer, shot 67 as he joined his playing partner on nine under par.
Australia's Marcus Fraser and Portugal's Ricardo Santos also hold a share of the lead after two rounds.
Garcia, who hit six birdies, said: "I managed to play smart and do that fairly nicely."
England's Gary Lockerbie is part of a group of five players on eight under, while his compatriots, Chris Wood and Anthony Wall, are a further stroke behind.
Garcia, who underwent laser eye surgery to correct astigmatism last year, was happy with the way he coped with a strong breeze that followed calm conditions on his first round.
"It was not the strong wind we are used to seeing here," said the 33-year-old. "But we had to choose the right clubs and it made some of the drives a little tougher."
Defending champion Paul Lawrie missed the cut by a single stroke after a four-putt double bogey on the 15th.