Briefs | IAAF supports ex-sprinter Maurice Greene

Track and field

Governing body dismisses allegations of doping against Greene: Track and field's world governing body, the IAAF, dismissed doping allegations against retired American sprinter Maurice Greene, who won two Olympic gold medals in 2000.

Greene also denied the accusations, which were made by a witness in a U.S. government investigation into sports doping and reported last weekend in The New York Times. Angel Guillermo Heredia said he advised and supplied banned substances to track coach Trevor Graham and athletes, including Greene and Marion Jones.

"None of this is new," IAAF spokesman Nick Davies said. "There is no reason to take action against Maurice."

Greene, who announced his retirement in February, never failed a doping test. Greene told Britain's Daily Telegraph he had met with Heredia but did not receive or use any drugs.

"This is a bad situation for me," Greene told the Daily Telegraph. "My name's coming up in something and it's not true. ... I have met him before and when he was talking to me, I told him I don't believe in this stuff."

Davies said the U.S. Anti-Doping Agency had been looking into the link for years, without finding proof.

Tennis

Harrison is first to win ATP Tour main-draw match at 15 since 2002: Fifteen-year-old Ryan Harrison beat Pablo Cuevas of Uruguay 6-4, 6-3 in the U.S. Clay Court Championships in Houston to become the 10th player in the Open era, which started in 1968, to win a main-draw match before his 16th birthday.

Harrison, who trains in New Braunfels, Texas, is the youngest player to get a main-draw win on the ATP Tour since Spain's Rafael Nadal in 2002. Nadal is ranked No. 2 in the world.

Harrison, who will turn 16 next month, won 17 of 18 points during one stretch of the first set.

"You always want to feel like you can win," Harrison said after the victory. "To go out and make it happen is another thing."

Cuevas is ranked 95th in the world. Harrison entered the match tied for 1,277th.

Federer to work with coach Higueras this week: Top-ranked Roger Federer, who hasn't reached a final in four tournaments this year, said he will work with coach Jose Higueras at the Estoril Open in Portugal this week.

"We are going to spend the week together to see if we could make a good team," Federer said on his Web site.

Federer, 26, has worked without a coach since splitting with Tony Roche in May.

Golf

Immelman appears on Letterman show: Masters winner Trevor Immelman of South Africa read the Top Ten list on CBS's "Late Show with David Letterman."

Item No. 6 on the list of ways Immelman's life has changed was "President Bush called to congratulate me on winning Wimbledon." The No. 1 item was, "Get to put my arm around Tiger Woods and say, 'Maybe next year.' "

Rating report: Sunday's final-round coverage of the Masters on CBS drew an overnight rating of 8.9, down 2 percent from last year's 9.1 rating. Overnights measure the nation's 56 largest television markets.

Soccer

U.S. women to face Canada on May 10: The U.S. and Canadian women's teams will play a May 10 warmup match for the Beijing Olympics. The exhibition will be played at RFK Stadium in Washington.

Olympics

Mayor Daley sounds eager to make case for Chicago: Mayor Richard Daley said he would welcome an extra chance to pitch Chicago to the International Olympic Committee before it decides which city will host the 2016 Summer Games.

Last week, the IOC's executive board said finalist cities would be able to explain their bids to IOC members at a special meeting a few months before next year's final vote.

"It's a good venue for us to make a presentation," said Daley, who spoke to reporters at a U.S. Olympic Committee media summit.

Canadian Football League

Jackson dies: Hamilton Tiger-Cats linebacker Jamacia Jackson, 26, was found unresponsive at his girlfriend's Sumter, S.C., home and pronounced dead at a hospital. The cause of death was not immediately known.

Seattle Times news services