Peter Hanson shot a 2-under 70 to lead Ryder Cup teammate Rory McIlroy by one stroke after the third round of the inaugural BMW Masters on Saturday.
Hanson, who won the KLM Open last month, was at 15-under 200 at the Lake Malaren Course.
McIlroy shot a 69 and is chasing a fifth title this season. He won the exhibition Shanghai Masters tournament on the same course last year.
George Coetzee of South Africa (66) was in third at 12 under.
Alexander Noren of Sweden (69), Michael Hoey of Northern Ireland (68), South Africa's Charl Schwartzel (68), Shane Lowry of Ireland (69) and the England pair of Justin Rose (69) and Luke Donald (68) were tied for fourth another shot back.