On Saturday at the 2012 U.S. Open, Roger Federer and Serena Williams headlined a group of stars that advanced.
Federer was absolutely brilliant against No. 25 Fernando Verdasco, defeating the Spaniard in straight sets. Federer showed why he's been a champion throughout the year, winning 6-3, 6-4, 6-4 to move into the second week.
Andy Murray had a serious scare but was able to survive No. 30 Feliciano Lopez. In perhaps the most thrilling match of the afternoon, the Englishman eventually dispatched Lopez in four sets that featured three tiebreaks, 7-6 (7-5), 7-6 (7-5), 4-6 and 7-6 (7-4).
James Blake is in progress and losing to Milos Raonic 6-3, 5-0 in the second set.
As for the women, Williams put on a show while beating Ekaterina Makarova 6-4, 6-0. Williams was the overwhelming favorite of many experts to win her fourth U.S. Open title and has shown why thus far.
In the biggest upset of the day, Andrea Halvachoka throttled No. 14 Russian Maria Kirilenko in three sets, 5-7, 6-4, 6-4.
For a full look at the scores, please click here.