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CYCLING • Cedar Hills native and BYU graduate Ariel Martin will compete for the U.S. at the BMX world championships July 24-28 in Auckland, New Zealand, joining a women's team that includes Olympians Alise Post and Brooke Crain. Martin qualified for the London Games but withdrew after a training crash.

Connor Fields will attempt to defend his time trial title when he leads the U.S. men's team into the championships. The team, announced Tuesday, includes Fields' fellow Olympians David Herman and Nic Long. Also making the team are Jared Garcia, Justin Posey, Barry Nobles and Corben Sharrah.

American among IOC candidates

olympics • The head of the U.S. Olympic Committee was nominated for membership of the IOC on Tuesday, a big boost for U.S. efforts to regain influence on the international Olympic stage. In the latest sign of improved ties between the two bodies, USOC President Larry Probst was among nine candidates put forward for election to the International Olympic Committee in Lausanne, Switzerland. The nominees for IOC membership will be up for election — usually a formality — at the full general assembly in Buenos Aires, Argentina, on Sept. 10. The USOC is currently considering a bid for the 2024 Summer Games. The U.S. last hosted a Summer Games in 1996 in Atlanta, and the Winter Games in 2002 in Salt Lake City.

Klitschko to face Povetkin in October

Boxing • Wladmir Klitschko will defend his multiple heavyweight titles against mandatory challenger Alexander Povetkin in a highly anticipated showdown on Oct. 5 in Moscow. Klitschko's management says the fight, long in the making, will take place in the Olympic Arena. Klitschko holds the IBF and IBO belts and is also the WBO and WBA "super champion." Povetkin, 33, is WBA's "regular champion." Klitschko's older brother Vitali is the WBC champion. Russia's Povetkin has a 26-0 record, with 18 KOs. Klitschko is 60-3. His last fight was a sixth-round TKO over Francesco Pianeta in May.

From wire reports