Djokovic wants clear protocols' in tennis after Sinner doping case

"I understand the frustration of the players is there, because of a lack of consistency. We see a lack of standardized and clear protocols."

"Some players commented on social media, wondering if Sinner caught a break because of his standing as one of the best players in the game."

"Can't imagine what every other player that got banned for contaminated substances is feeling right now," wrote Denis Shapovalov after the ruling on Sinner.

"As I understood, his case was cleared the moment basically it was announced. This raises questions regarding the treatment of players in similar situations."

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