Serbian tennis great says he understands the frustration of some players over the ‘lack of consistency’ in doping rules.

Tennis great Novak Djokovic gets why some players question whether there are double standards in the sport after Jannik Sinner was spared action despite testing positive for steroids twice, saying he agrees that there is “a lack of consistency”.

Sinner tested positive twice in March for an anabolic steroid, but the International Tennis Integrity Agency determined the banned performance enhancer entered his system unintentionally through a massage from his physiotherapist.

The ruling was announced on Tuesday, less than a week before Sinner begins the US Open as the top-seeded man. Djokovic, who won the tournament last year for a record 24th Grand Slam men’s singles title, is the second seed.

“I understand the frustration of the players is there, because of a lack of consistency,” Djokovic said.

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