(Melbourne, Australia) -- There will be a new men's winner at the Australian Open this year. Three-time defending champion Novak Djokovic was knocked out in a five-set, quarterfinal thriller by eighth seeded Stanislas Wawrinka of Switzerland. Wawrinka won 2-6, 6-4, 6-2, 3-6, 9-7. The fifth set was briefly interrupted by a rain shower. Djokovic had won 25 straight matches at the Aussie Open and had beaten Wawrinka in their last 14 meetings. Seventh-seeded Tomas Berdych beat third-seeded David Ferrer 6-1, 6-4, 2-6, 6-4 in Tuesday's other quarterfinal.

On the women's side, fourth-seeded Li Na and 30th seed Eugenie Bouchard won quarterfinal matches Tuesday. A two-time runner-up, Li whipped 28th-seeded Italian Flavia Pennetta 6-2, 6-2 in a match that lasted just 67 minutes. Bouchard upset 14th-seeded former world number-one Ana Ivanovic 5-7, 7-5, 6-2 in two hours, 24 minutes to secure a berth in her first-ever Grand Slam semi.