Sharapova: Serena is on a major roll

After Serena Williams routed her 6-0, 6-1 in the Olympic final, four-time Grand Slam champion Maria Sharapova said the 14-time Grand Slam champion has raised her level of play.

"She's playing incredibly confident tennis," said Sharapova, who has only managed to win nine games against Williams in their last three matches. "After winning Wimbledon, you've seen her level progress so much here over this tournament. With every match she's played, she's playing better, hitting harder, so much power on the ball. Even against the wind today, her shots were very powerful. Yeah, I mean, she's done an incredible job of keeping that up."