BERLIN -- Top-ranked Martina Hingis, unbeaten on clay this year, beat Silvia Farina of Italy 6-0, 7-5 in 58 minutes Wednesday to reach the third round of the German Open.

Hingis, winner of the Hamburg and Rome events the past two weeks, improved her record to 10-0 on clay. Along the way, she beat teen-age rivals Venus Williams, Russia's Anna Kournikova and Croatia's Mirjana Lucic.

The Swiss teen-ager swept the first set in only 19 miutes against Farina. But late in the second, Hingis tired and lost concentration.

"THERE'S NO DANGER OF BURNOUT from this much tennis as long as I keep winning," Hingis said, laughing. "Beating players like Williams and Kournikova is a super feeling.

"Besides, I hate to practice at home. I want to play matches. So now my mom says this is what I wanted, so I have to enjoy it."

While several top 10 players won, sixth-seeded Mary Pierce of France was forced to withdraw after straining her left thigh against Austrian Barbara Paulus while trailing 6-4, 6-7 (1-7), 1-3.

The injury is not expected to sideline Pierce for the French Open, which begins in two weeks.

"I don't think it will, but it's something I want to rest for a few days and see how it is," said Pierce, a 1994 finalist at Roland Garros.

PIERCE GAVE AWAY TWO MATCH points in the second set after she felt a muscle tighten while chasing a drop shot.

Czech Jana Novotna, seeded third, had to fight off four match points and battle 2 hours, 40 minutes before beating Austria's Barbara Schett 1-6, 7-6 (8-6), 7-6 (7-3).

South Africa's Amanda Coetzer, the fourth seed, joined her in the third round by defeating Germany's Andrea Glass 6-0, 4-6, 6-1, while No. 5 Arantxa Sanchez Vicario of Spain topped Marie Alejandra Vento of Venezuela 7-5, 6-4.

Hingis led 5-3 in the second set before Farina broke her serve, then pulled even at 5-5 when the Swiss player's hurried forehand slice sailed long.

"With me serving at 5-3, I thought the win would go by itself - and it didn't. I was a little tired," she said.

HINGIS HOPES HER CURRENT domination on clay will extend to the French Open.

"The French Open is a major goal -- that's the only Grand Slam I haven't won," she said.

On Thursday, Hingis faces Iva Majoli Thursday in a rematch of last year's French Open final won by the Croatian.

Majoli defeated Poland's Magdelena Grzybovska, 6-4, 6-0, while Kournikova beat fellow Russian Elena Likhovtseva, 6-2, 6-1.