In Tuesday’s day matches, Toronto champion Serena Williams advanced to the second round. This year's French Open champion Li Na, last year’s French Open runner-up Samantha Stosur and ’08 Australian Open finalist Jo-Wilfried Tsonga also advanced on a day that saw nine Grand Slam singles champions in action.

 

Williams cruised through the first set until opponent Lucie Hradecka’s level of play increased. "Yeah, I was just, I don't know. I was definitely up and I didn't close it out, and she started playing different and better and running a lot. I just, you know, was struggling at that point," said Williams.

 

She ended up winning 6-3, 7-6 after Hradecka double-faulted on match point.

 

Up next for Williams is the No. 10 seed Samantha Stosur, who the American defeated in Toronto to take her second Olympus US Open Series title of the summer.

 

Williams discussed the upcoming match. "Sam is playing great. We had a really actually tough match in Toronto, and it was a big win for me. She plays really well, so we'll see," she said.

 

Australian Stosur had an easier time advancing to the second round. She defeated Eleni Daniilidou of Greece 6-3, 6-1 in just 49 minutes.

 

Li defeated Lucie Safarova 6-3, 6-4 in the day’s opening match on Center Court.

 

The No. 10 seed Jo-Wilfried Tsonga, a semifinalist in Montreal and Wimbledon, defeated World No. 26 Marin Cilic 6-3, 6-4 to play American Alex Bogomolov Jr. in round two.

 

Isner’s Cincinnati tournament, however, came to an end in a three-set loss to recent Washington, D.C. titlist Radek Stepanek. The 6’9" American lost 7-5, 5-7, 7-6(4). Stepanek, ranked No. 27 in the world, is currently tied for 4th place in the Olympus US Open Series.

 

About the match, he said, "Yeah, it was close. I don't feel like I played too well, to be honest, but I'll just put it behind me and just, you know, not think too much of it. Try not to let it bother me too much."

 

In other results from the day, last year’s Wimbledon finalist Tomas Berdych defeated Juan Monaco, France’s Michael Llodra upset the No. 13 seed Mikhail Youzhny, Russian Andrey Golubev defeated No. 16 seed Stanislas Wawrinka, former World No. 1 Jelena Jankovic took out Iveta Benesova and Italian Flavia Pennetta won against the No. 12 seed Anastasia Pavlyuchenkova.