Some of Britain's top cycling stars have pulled out of the Commonwealth Games later this year to concentrate on the 2012 Olympics.
Victoria Pendelton, who won gold in the Beijing games, and Chris Hoy, who is a four-time Olympic champion, have both decided not to compete in Delhi.
It's because the European Cycling Championships are on at the same time.
Riders can earn points there towards Olympic qualification, but they can't at the Commonwealth Games.
Victoria Pendleton said: "It's really unfortunate we can't do both competitions and support the Commonwealth Games.
"I'm really disappointed that I can't support India in their Games.
"But we have been put in a situation where the European Championships clash and we can't ignore an opportunity to gain points for the Olympics."