The American tennis player Wayne Odesnik has accepted "a voluntary provisional suspension" from all events, and the International Tennis Federation hasn't said how long the suspension will last.
Last month, Odesnik pleaded guilty to importing human growth hormone into Australia before a tournament ahead of the Australian Open. He was fined 8-thousand dollars, but continued playing on the ATP tour, reaching the semi-finals of this month's US Clay Court Championships.
Under current rules, the ITF can only provisionally suspend players who are being investigated for a failed drugs test.