ESPN

Welcome to The Show! On Thursday, former Tour de France winner, Greg LeMond, will stop by to take your questions on the recent doping allegations surrounding American cyclist and Tour de France winner Floyd Landis and the future of the sport.

Thursday. questions were raised about Landis' Tour victory when it was announced Landis tested positive for high amounts of testosterone after Stage 17, when he started his remarkable comeback.

In 1986, LeMond became the first American to win the Tour de France. He won the event two more times, in 1989 and 1990, to become one of only eight cyclists to win the Tour three or more times.

Send your questions for Greg now and join The Show on Thursday at 5 p.m. ET.

LeMond will be a guest Thursday, July 27 on "Outside the Lines: The First Report" at 3:30 p.m. ET on ESPN. The show airs daily Monday-Friday covering all the hottest topics in sports.