Here are the 2011 US Open fourth round results:
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Women’s Singles:
Vera Zvonareva (RUS) [2] def. Sabine Lisicki (GER) [22] 6-2, 6-3
Flavia Pennetta (ITA) [26] def. Shuai Peng (CHN) [13] 6-4, 7-6
Samantha Stosur (AUS) [9] def. Maria Kirilenko (RUS) [25] 6-2, 6-7, 6-3
Angelique Kerber (GER) def. Monica Niculescu (ROU) 6-4, 6-3
Anastasia Pavlyuchenkova (RUS) [17] def. Francesca Schiavone (ITA) [7] 5-7, 6-3, 64
Serena Williams (USA) [28] def. Ana Ivanovic (SRB) 6-3, 6-4
Caroline Wozniacki (DEN) [1] def. Svetlana Kuznetsova (RUS) [15] 6-7, 7-5, 6-1
Andrea Petkovic (GER) [10] def. Carla Suarez Navarro (ESP) 6-1, 6-4
Men’s Singles:
Jo-Wilfried Tsonga (FRA) [11] def. Mardy Fish (USA) [8] 6-4, 6-7, 3-6, 6-4, 6-2
Roger Federer (SUI) [3] def. Juan Monaco (ARG) 6-1, 6-2, 6-0
Janko Tipsarevic (SRB) [20] def. Juan Carlos Ferrero (ESP) 7-5, 6-7, 7-5, 6-2
Novak Djokovic (SRB) [1] def. Alexander Dolgopolov (UKR) 7-6, 6-4, 6-2
Donald Young (USA) vs Andy Murray (GBR) [4]
Gilles Muller (LUX) vs Rafael Nadal (ESP) [2]
David Ferrer (ESP) [5] vs Andy Roddick (USA) [21]
John Isner (USA) [28] vs Gilles Simon (FRA) [12]
