The women's singles semifinals of the 2011 Australian Open were played on January 27. The men's singles semifinals were held on January 27 and 28.
Men's Singles
- Andy Murray (5), UK, defeated David Ferrer (7), Spain, 4-6, 7-6, 6-1, 7-6, and advanced to the men's singles final.
- Novak Djokovic (3), Serbia, defeated Roger Federer (2), Switzerland, 7-6, 7-5, 6-4, and advanced to the men's singles final.
Women's Singles
- Na Li (9), China, defeated Caroline Wozniacki (1), Denmark, 3-6, 7-5, 6-3, and advanced to the women's singles final.
- Kim Clijsters (3), Belgium, defeated Vera Zvonareva (2), Russia, 6-3, 6-3, and advanced to the women's singles final.
