Friday's action in the 2011 U.S. Open featured a couple of upsets. Maria Sharapova, the No. 3 seed, lost to Flavia Pennetta in three sets and was joined by No. 14 men's seed Stanislas Wawrinka. The Swede lost to young American Donald Young. Andy Murray had a battle on his hands with Robin Haase, but survived in five sets.
Round 3 continues into Saturday with plenty of top seeds on the schedule. Here are some of the day's notable matches:
No. 1 Novak Djokovic vs. Nikolay Davydenko, Night Session
No. 3 Roger Federer vs. No. 27 Marin Cilic, Afternoon Session
Kevin Anderson vs. No. 8 Mardy Fish, Afternoon Session
No. 9 Tomas Berdych vs. No. 20 Janko Tipsarevic, Morning Session
No. 1 Caroline Wozniacki vs. Vania King, Morning Session
No. 4 Victoria Azarenka vs. No. 28 Serena Williams, Afternoon Session
Sloane Stephens vs. No. 16 Ana Ivanovic, Night Sessions
No. 10 Andrea Petkovic vs. No. 18 Roberta Vinci, Morning Session
For a full schedule, visit the U.S. Open's official site.