Forehands, backhands, big serves. Caroline Wozniacki got almost everything back yesterday, frustrating Maria Sharapova in a 6-3, 6-4 victory to advance to the quarter-finals of the U.S. Open.

Top-seeded Wozniacki won the way she always does — by chasing down hundreds of balls and forcing the other player into making mistakes.

The 14th-seeded Sharapova, trying to return to the quarter-finals at Flushing Meadows for the first time since winning it all in 2006, fought for longer than any of Wozniacki’s opponents to this point. But as the pressure of Wozniacki’s consistency built, the hard-hitting Russian went for even more, with limited results.

Sharapova wound up making 36 unforced errors. Wozniacki finished with 10 in what was, by far, her biggest challenge of the tournament thus far.

“I knew it wasn’t going to be easy,” said Wozniacki, who lost to Kim Clijsters in the final last year. “I got a lot of experience from last year, so it definitely helped me today.”

Wozniacki improved to 18-1 since Wimbledon and stretched her winning streak to 12 matches. Through her first four U.S. Open matches, she has lost a total of 10 games. Maybe most impressive, though, is this stat: She’s made 40 unforced errors, compared to 123 by her opponents.

In men’s action, Roger Federer reached the quarter-finals at a 26th major in a row by beating No. 13 Jurgen Melzer of Austria 6-3, 7-6 (4), 6-3 in last night’s final match.

He will take on No. 5 Robin Soderling in the quarter-finals.

Latest From ...