Defending champion Novak Djokovic lost to Stanislas Wawrinka of Switzerland in the men's singles quarterfinals at Australian Open here Tuesday.
Eighth seed Wawrinka rallied to beat the second seeded Serb 2-6, 6-4, 6-2, 3-6, 9-7.
In the semifinals, Wawrinka will face seventh seed Tomas Berdych, who beat third seed David Ferrer of Spain 6-1, 6-4, 2-6, 6-4.