"Sometimes there is like a fight. But I think that's fine. It's normal. It means that I'm there," Muguruza said. 

A collection of photos from the Western and Southern Open, from photographer Christopher Levy.

The 30-year-old world No. 8 will fly back to Europe for tests.

Top seed tops Tomic to extend winning streak to 21 matches.

The 2014 U.S. Open has the serve and is looking to add to his arsenal with new coach Jonas Bjorkman.

"She's been phenomenal to the sport of tennis," Hall of Famer says of Serena.

Nadal says all the tennis from Rio finally took its toll on his body.