American sprinter Allyson Felix's pursuit of a rare 200-400 meters double at the Rio Olympics gained momentum Monday when US officials asked the IAAF for a schedule change to make an attempt possible. "We did receive an official request today from USATF," Paul Hardy, competitions director for the International Association of Athletics Federations (IAAF), told Reuters in an email. "This will be reviewed in the next few days." Felix, the Olympic 200m gold medalist and world 400m champion, is seeking to become only the third female to complete the double in the Summer Games. "Allyson is the most decorated female athlete in IAAF history and should have the chance to go for a double, competing in what likely will be her fourth and final Olympic Games," USA Track & Field (USATF) CEO Max Siegel said in making the request. "Such an achievement would elevate the sport at the Games, and as a federation we owe it to her and to the sport as a whole to make the request." The current Rio schedule would make the double a daunting challenge. Felix, winner of 20 Olympic and world championship medals, would need to compete in the first round of the 200m 75 minutes before the 400m final. "Adjusting the schedule in my opinion does not hurt anybody," coach Bob Kersee told Reuters. Only twice has a female athlete won both at the Olympics. Kersee-coached Valerie Brisco-Hooks claimed the honor in 1984 and France's Marie-Jose Perec won both in 1996. The IAAF changed the schedule in 1996 so Perec and American Michael Johnson could attempt their double with Johnson breaking the world record in the 200m and winning the 400m. "All our training is toward her doing both," Kersee said. "We are going to double at our Olympic trials and try and make the team in the 4 and the 2." Felix, 30, has tried the 200-400m double once on the global scene, finishing second in the 400m and third in the 200m at the 2011 world championships. She wanted to attempt the double at the 2015 world championships, but decided the schedule would be too difficult. Felix instead blazed to victory in the 400m with Dutch sprinter Dafne Schippers claiming the 200m in the fourth fastest time ever. The two, along with Jamaican Olympic silver medalist Shelly-Ann Fraser-Pryce, likely will clash again in one of the highlights of the Rio Olympics. Bolt to run in London Usain Bolt says he will run at the London Diamond League meeting in July, weeks before he defends his Olympic titles in Rio de Janeiro. Bolt will run on July 22-23 at the Olympic Stadium, the venue where he won 100, 200 and 4x100-meter gold at the London Games. The Rio Olympics run from Aug. 5-21, with track and field scheduled for Aug. 12-19. Bolt says he is competing in London because "there are a lot of Jamaicans living in the UK and I always get great support — it is like my home away from home." Bolt took part in the event this year, winning the 100. He then won another sprint triple at the world championships in Beijing in August.