Tennis: America's Wayne Odesnik banned for 15 years post second doping violation

American tennis player Wayne Odesnik was banned Wednesday for 15 years after a second doping violation.

The International Tennis Federation said the 29-year-old Odesnik tested positive for several banned substances, including steroids, during tests in December and January. The ban was back-dated to January 30 and will run until January 29, 2030.

Odesnik was first sanctioned in 2010 for the possession of human growth hormone. Odesnik was off the tour form April 2010 to August 2011 after pleading guilty in Australia to importing HGH. He denied using the drug, and repeatedly said he 'never tested positive'.

The ITF originally banned him for two years, but cut the penalty in half, saying he cooperated with investigators. At last year's US Open, Odesnik earned a wild-card but lost to eventual finalist Kei Nishikori in the first round. It was the first time he played in the tournament's main draw since 2009, shortly before his first ban.

This year, he lost in qualifying ahead of the Australian Open.