RALEIGH, North Carolina (Reuters) – U.S. world 100 metres silver medallist Tyson Gay had an arthroscopic procedure on his injured right hip and will not run again this year, his manager said on Thursday.

Gay, the world’s second fastest man behind Usain Bolt, had the surgery Tuesday in Vail, Colorado, Mark Wetmore said in a statement.

“The doctor was pleased with the outcome and believes Tyson will resume his normal base training in the fall as he prepares for 2012,” said Wetmore.

The frequently-injured Gay had hoped to race Jamaica’s Bolt in the headline event of August’s world championships but was forced to withdraw from the U.S. world trials 100 metres semi-finals last month because of the hip injury.

He will now focus on recovering and preparing for the 2012 London Olympics and an anticipated showdown with Bolt.

Although one of the top sprinters of all-time and the American 100 metres record holder at 9.69 seconds, he has never won an Olympic medal.

The surgery should give him another chance.

EUGENE, Oregon (Reuters) – A balanced U.S. team bursting with talent should dominate the medals at this year’s athletics world championships, its men’s coach said after the American trials concluded on Sunday.

Although such big names as 2011 world leaders Tyson Gay and Brad Walker failed to make it through the cut-throat trials, Vin Lanana said he believed the United States would top the medals table at the August 27-September 4 championships in Daegu, South Korea.

“We have the number one team in the world, and I think we are in a position this year to keep that string alive,” Lanana told Reuters.

“We have a good combination, a good balance of veterans and youth.”

Jumpers, hurdlers, sprinters, shot putters and decathletes power the men’s team.

Long jumper Dwight Phillips, 400 meters hurdler Kerron Clement, shot putter Christian Cantwell and decathlete Trey Hardee will travel to Daegu as reigning champions.

World leaders David Oliver, Jesse Williams and Ashton Eaton could also win gold.

EUGENE, Oregon (Reuters) – Olympic double bronze medallist Walter Dix will have a chance to race Usain Bolt twice in August’s world championships after winning the 200 metres at the American trials on Sunday.

The victory, in a wind-assisted 19.95 seconds, completed a sprint double for Dix, who won bronze medals in the 100 and 200 metres at the 2008 Olympics where Jamaican Bolt swept to world records in both.

“I can’t really see myself losing,” Dix said of the upcoming world championships in Daegu, South Korea.

“Usain Bolt, Asafa Powell, whoever is there I am going to give them a good shot,” Dix said. “I am confident I can win the gold after what I did today.”

Dix, who won the U.S. 100m title on Friday, became the first to claim both national championships since Tyson Gay in 2007. The wins came with little speed training, Dix said, and he promised to run faster as the season progresses.

“To come out here and run under 10 seconds (in the 100) and under 20 in the 200 is truly a blessing,” he added.

Doc Patton was a close second in 19.98 with Jeremy Dodson claiming the third spot on the U.S. team for the world championships.

EUGENE, Oregon (Reuters) – Allyson Felix kept alive the possibility of a bid for a world championship double in the 200 and 400 metres as she clinched her first national 400m title at the U.S. trials on Saturday.

Felix, challenged by runner-up Francena McCorory down the straight, ran strongly to the finish in 50.40 seconds and become the first woman to win U.S. titles in the 100, 200 and 400m.

“I knew it was going to be racing home,” said Felix, who has five U.S. 200m titles and added the 100m last year. “I wanted to be in position to use my speed.”

McCorory clocked 50.49 to beat world indoor champion Debbie Dunn, who finished in 50.70.

Felix, who will defend her 200m title at the August world championships in Daegu, South Korea, said she was undecided on whether she would attempt the double, but hoped to make the decision soon.

She also left open the possibility of doing as many as four events at the world championships and confirmed she would attempt the 4×100 and 4x400m relays.

Collegian Tony McQuay surprised former Olympic and world champion Jeremy Wariner for the men’s 400m title.

EUGENE, Oregon (Reuters) – Allyson Felix kept alive the possibility of a bid for a world championship double in the 200 and 400 meters as she clinched her first national 400m title at the U.S. trials on Saturday.

Felix, challenged by runner-up Francena McCorory down the straight, ran strongly to the finish in 50.40 seconds and become the first woman to win U.S. titles in the 100, 200 and 400m.

“I knew it was going to be racing home,” said Felix, who has five U.S. 200m titles and added the 100m last year. “I wanted to be in position to use my speed.”

McCorory clocked 50.49 to beat world indoor champion Debbie Dunn, who finished in 50.70.

Felix, who will defend her 200m title at the August world championships in Daegu, South Korea, said she was undecided on whether she would attempt the double, but hoped to make the decision soon.

She also left open the possibility of doing as many as four events at the world championships and confirmed she would attempt the 4×100 and 4x400m relays.

Collegian Tony McQuay surprised former Olympic and world champion Jeremy Wariner for the men’s 400m title.

EUGENE, Oregon (Reuters) – America’s newly-crowned 100 metres champion Walter Dix does not plan to be intimidated by Jamaica’s sprint machine at August’s world championships in South Korea.

Dix, who won bronze medals in both the 100 and 200m at the 2008 Beijing Olympics where Jamaican Usain Bolt ripped up the record books, was oozing with confidence after his win over Justin Gatlin in Friday’s U.S. world trials.

“Jamaicans, they’re fast. They are just about as good as us,” Dix told reporters after he pipped Gatlin by a hundredth of a second in Friday’s race. “So it will be like competing against us, just more of us.”

Bolt, former world record holder Asafa Powell, young Yohan Blake and impressive Steve Mullings will line up for Jamaica against the American trio of Dix, Gatlin and former U.S. champion Mike Rodgers in Daegu, South Korea.

Tyson Gay, the world’s second fastest man behind Bolt, did not make the U.S. team after withdrawing from the semi-finals with hip problems.

Dix admitted the Americans would have to step up without Gay, but said, “It’s not going to be anything different than what happened at this meet. I’m just going to get ready to run faster.”

(Editing by Frank Pingue; To query or comment on this story email sportsfeedback@thomsonreuters.com)

EUGENE, Oregon (Reuters) – Tyson Gay’s dream of a world championship re-match with world record holder Usain Bolt in the 100 metres ended on Friday when the American pulled out of the semi-finals of the United States trials with a hip injury.

“Today, I just couldn’t get it to go no matter how hard I tried,” the world’s second fastest man said on his Facebook page (www.facebook.com/tyson.gay).

“My only focus now is to get healthy,” the disappointed Gay said.

His manager Mark Wetmore said the American record holder was forced to withdraw from the 100 after he was unable to warm up due to a hip and adductor problem on his right side.

Wetmore told Reuters that Gay would not take part in the 200 metres trials beginning on Saturday.

The injury cost the upcoming world championship organisers its headline matchup – a showdown between Gay and Bolt – and robbed the American team of its only sprinter within striking distance of the Jamaican.

“It is a big blow,” said U.S. 100 metres winner Walter Dix. “Tyson at his best is one of the top runners in the world.

EUGENE, Oregon (Reuters) – Olympic bronze medalist Walter Dix pipped Justin Gatlin by a hundredth of a second in the 100 meters at the U.S. world trials on Friday following Tyson Gay’s shock withdrawal due to injury.

Gatlin, on the comeback trail after serving a four-year doping ban, was reeled in over the closing meters by the lower-profile Dix who recorded a time of 9.94 seconds.

“I just let it rip,” said Dix, who won bronze medals in both the 100 and 200m at the 2008 Beijing Olympics where Jamaican Usain Bolt ripped up the record books.

An emotional Gatlin, banned from 2006-10 because of a doping offence, cried tears of joy after crossing the line.

“For the last four years I have had so much pent-up frustration, sadness, so much emotion, anger, (that) before the finish line I let it all out,” said the 29-year-old, a former Olympic and world champion. “I thought I won.”

Mike Rodgers clocked 9.99 seconds to complete the U.S. 100m trio for the world championships after Gay, American record holder and the world’s second-fastest man of all-time, withdrew before the semi-final, citing painful problems with his right hip and adductor.

Gay, whose agent also confirmed he would not compete in the 200m trials, is left with only a possible berth in the 4x100m relay for the world championships in Daegu, South Korea, should he recover in time for the trials.

EUGENE, Oregon (Reuters) – Tyson Gay’s dream of a world championship re-match with Jamaican record holder Usain Bolt in the 100 metres ended on Friday when the American pulled out the semi-finals of the United States trials with a troublesome hip injury.

“Tyson has scratched from the 100,” the world silver medallist’s agent Mark Wetmore said in a statement.

“He was unable to warm up due to a hip and adductor problem on his right side.”

Wetmore also told Reuters that Gay would not try to run in the 200m trials beginning on Saturday.

Gay could be a part of the U.S. world 4x100m relay team if he recovered in time, USA Track and Field officials said.

Only the top three finishers in each event at the U.S. meeting qualify for the world championships in Daegu, South Korea, in August.

The world’s second fastest man, Gay has been troubled by hip and adductor problems for some time. He had earlier cast doubt on competing in the 200m at the U.S. trials because of the problems.

EUGENE, Oregon (Reuters) – Tyson Gay’s dream of a world championship re-match with Jamaican record holder Usain Bolt in the 100 meters ended on Friday when the American pulled out the semi-finals of the United States trials with a troublesome hip injury.

“Tyson has scratched from the 100,” the world silver medallist’s agent Mark Wetmore said in a statement.

“He was unable to warm up due to a hip and adductor problem on his right side.”

Wetmore also told Reuters that Gay would not try to run in the 200m trials beginning on Saturday.

Gay could be a part of the U.S. world 4x100m relay team if he recovered in time, USA Track and Field officials said.

Only the top three finishers in each event at the U.S. meeting qualify for the world championships in Daegu, South Korea, in August.

The world’s second fastest man, Gay has been troubled by hip and adductor problems for some time. He had earlier cast doubt on competing in the 200m at the U.S. trials because of the problems.