CHANG ROLLS, REACHES SEMIFINALS.

Byline: Associated Press 

Top-seeded Michael Chang beat Argentina's Javier Frana 6-4, 6-1 Friday to move into the semifinals of the Singapore Open, and Wimbledon champion Richard Krajicek had to quit because of a knee injury.

Jonathan Stark became the second American to make the semifinals when he fired 12 aces to defeat Germany's Martin Sinner in two sets that went to tiebreakers, 7-6 (7-5), 7-6 (7-3).

Chang's opponent will be Greg Rusedski, a Canadian who plays out of Britain. He defeated Russian Andrei Olhovskiy 7-6 (7-4), 6-2.

Sukova upsets Sanchez Vicario: Steffi Graf can breathe a little easier at the Leipzig Open in Germany after Helena Sukova knocked Arantxa Sanchez Vicario out of the quarterfinals.

Sukova upset Sanchez Vicario 6-3, 7-6 (7-5) to advance to the semifinals, where she will play Iva Majoli of Croatia.

Majoli struggled to outlast Olympic champion Lindsay Davenport 6-7 (8-10), 7-6 (7-2), 7-6 (7-3) in the day's other quarterfinal match.

Mantilla, Corretja advance: Spaniards Felix Mantilla, the No. 2 seed, and Alex Corretja, seeded fourth, advanced to the semifinals of the $300,000 Marbella Open in Spain.

Mantilla survived a 2-hour, 14-minute match against Christian Ruud of Norway, winning 0-6, 7-6 (7-2), 6-3. Corretja defeated Marcelo Filippini of Uruguay, the surprise of the tournament, 7-5, 6-1.

Henman, Kafelnikov win: Tim Henman of Britain and Yevgeny Kafelnikov of Russia advanced to the semifinals of the Lyon Grand Prix in France along with Arnaud Boetsch and Thomas Enqvist.