Maria Sharapova rallied from a set down to overcome a shaky serve and advance at the U.S. Open.
Spinning in 70 mph second serves, grabbing at his hamstrings, Andy Murray gritted his way through cramps to win his first-round match at the U.S. Open.
Top-ranked Serena Williams is seeded No. 1 as she seeks her third straight U.S. Open title.
Novak Djokovic faced two set points early in his second-round match at the US Open. But he saved them, won the set, then needed less than an hour to close out a victory.
The fifth-seeded Li avenged her third-round upset loss to the young Brit at last year’s US Open, winning in straight sets Friday at the same stage at Flushing Meadows.
The top-ranked woman breezed to her third Rogers Cup title Sunday with a 6-2, 6-0 victory over unseeded Romanian Sorana Cirstea. This was her eighth WTA title of the year and the 54th of her career.
Agnieszka Radwanska cruised past Jelena Jankovic and into the fourth round of the US Open.
This US Open finally got its first shocker. After three days of the top players winning decisively, fifth-seeded Jo-Wilfried Tsonga was upset by Martin Klizan of Slovakia in the second round.
Radwanska beat Nina Bratchikova of Russia 6-1, 6-1 on Tuesday to start play at Arthur Ashe Stadium. The 91st-ranked Bratchikova had 28 unforced errors to only six for Radwanska.
Federer beat Murray in July for his record-tying seventh championship at Wimbledon; Murray beat Federer this month on the same Centre Court grass for the gold medal.
Top-ranked Victoria Azarenka will be seeded No. 1 at the U.S. Open, with 2006 champion Maria Sharapova at No. 3 and three-time winner Serena Williams at No. 4.