The 19-year-old Serb will play either two-time defending champion Justine Henin or fellow Serb Jelena Jankovic.

"I was knowing I have to stay aggressive," Ivanovic said. "I play a great game. I lose no shots. I was thinking the game would be much closer."

Two-time Grand Slam champion Sharapova's drubbing was reminiscent of her 6-1, 6-2 loss to Serena Williams in the Australian Open final in January.

The Russian was looking to reach her third consecutive final in a major after winning last year's U.S. Open.

But Sharapova's performance was riddled with unforced errors and five double-faults, and she lasted little more than an hour on center court.

Playing in her first French Open semifinal, Sharapova complained last week that matches on clay made her feel like "a cow on ice," and she struggled to chase down Ivanovic's pinpoint strokes.

Sharapova lost six straight games to trail 5-0 in the second set, before holding for 5-1.

Ivanovic closed out the win with her fifth ace, then raised her arms in triumph and grinned as she trotted to the net.

Sharapova had 25 unforced errors to 11 for Ivanovic and hit only four baseline winners.

Ivanovic started quickly, holding her opening serve and then broke Sharapova immediately with a strong forehand flick down the line.

Sharapova double-faulted to go 5-1 down, broke back for 5-2, but lost the first set in 32 minutes when she double-faulted for the fourth time.

Ivanovic broke Sharapova in the second game of the second set. In the next game, Ivanovic was briefly in trouble at 0-30 down before rallying to win the next four points to move 3-0 up.

That was as close as Ivanovic got to feeling any pressure.

Sharapova wasted several chances to hold serve in the fourth game, and was broken again when she hit a forehand into the net after a brief rally.