In Thursday's quarterfinals, Mauresmo, who ranks second in the latest world rankings, trounced Roberta Vinci of Italy, 6-4, 6-0. Hingis topped No. 6 Svetlana Kuznetsova of Russia, the 2004 Doha runner-up, 7-6 (9-7), 6-2.
With her victory, Mauresmo, who won the Australian Open in January, rose to 18-2 overall so far this season. Hingis, who won this event in 2001, increased her 2006 record to 16-5 since re-joining the WTA Tour in January.
Mauresmo has won her last two meetings against Hingis.
In other matches Thursday, No. 2 seed Nadia Petrova beat Na Li of China, 6-4, 6-4; and Ai Sugiyama of Japan eliminated Julia Schruff of Germany, 6-3, 6-2. Petrova and Sugiyama meet in Friday's other semifinal.