The tennis star has warned Jannik Sinner that his three-month doping suspension will persist over his career like a "cloud" – and raised doubts about the timing of the penalty last year.
Sinner completed a three-month prohibition in February 2025 after the World Anti-Doping Agency accepted his explanation that a prohibited performance-enhancing substance, clostebol, had been ingested unintentionally.
"This shadow will trail him just as the Covid controversy will follow me, for the rest of his, or my career," Djokovic stated in an interview on Piers Morgan: Uncensored.
"It's just something that, it was so significant, and when that happens, with time it may lessen, but I don't think it will disappear. There will inevitably exist a certain group of people that will always try to bring that forward."
The Serbian player stated that Sinner, a regular practice partner, "didn't do it on purpose", but he proceeded to question how the player arranged to complete his ban without sitting out any major tournaments.
"There is the lack of transparency, the inconsistency, the convenient timing of the suspension coming between the slams, so he doesn't miss out the others – it's just it was very, very odd," he further commented.
"I really don't like how the case was being handled and you could hear so many other players, across both tours, who had some similar situations coming out in the media and asserting it represented favorable handling."
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