Lucas Matthysse stopped Lamont Peterson in the third round Saturday night at Boardwalk Hall in Atlantic City in a matchup of junior-welterweight champions.

Matthysse (34-2, 32 KOs) had two knockdowns in the third round.

IBF welterweight champion Devon Alexander earned a convincing victory over Lee Purdy at Boardwalk Hall in a non-title bout. Referee David Fields stopped the fight on the advice of Purdy's corner at the end of the seventh round.

Alexander (25-1, 14 KOs), from St. Louis, was supposed to be making his first defense of his title, but Purdy (20-4-1, 13 KOs) failed to make the 147-pound weight limit.

ICE HOCKEY: The United States was upset, 3-0, by Switzerland in the semifinals of the ice hockey world championship in Stockholm. The Swiss will face Sweden in Sunday's final after the Swedes defeated cohost Finland, 3-0.

TENNIS: Roger Federer and Rafael Nadal will renew their rivalry in the Italian Open final Sunday in Rome. In the semifinals at the Foro Italico, Federer held off a stiff challenge from Frenchman Benoit Paire, 7-6 (5), 6-4, and six-time Rome champion Nadal defeated sixth-seeded Tomas Berdych, 6-2, 6-4.

In the women's tournament, Serena Williams is one victory away from winning her fourth consecutive title this year - with the French Open a week away. She will face third-seeded Victoria Azarenka in Sunday's final.

AUTO RACING: Australia's Will Power posted a four-lap qualifying average of 228.844 m.p.h. to tentatively grab the Indianapolis 500 pole.

NFL: The San Diego Chargers agreed to a two-year deal with aging star pass rusher Dwight Freeney that could be worth $13.35 million.

TRACK AND FIELD: Jamaica dominated the sprint races at the Diamond League meet in Shanghai, with Shelly-Ann Fraser-Pryce winning the women's 100 meters and Warren Weir capturing gold in the men's 200. American Jason Richardson took gold in the 110 hurdles, crossing in 13.23.

- Associated Press