Jannik Sinner's steroid case reignited on Saturday when the World Anti-Doping Agency (WADA) said it had appealed the decision to clear him and was seeking a ban of up to two years.
The Italian world No. 1 twice tested positive for traces of the banned substance clostebol in March but was exonerated and allowed to carry on playing.
The 23-year-old went on to win the U.S. Open earlier this month for his second major crown, after the International Tennis Integrity Agency (ITIA) found he "bears no fault or negligence."
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