Novak Djokovic has weighed in on tennis's high-profile doping cases and criticized what he perceives as double standards in the sport.

On the eve of his return to the court, Novak Djokovic has weighed in on the tennis’ high profile doping cases and criticized what he perceives as double standards in the sport.

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Novak Djokovic has hit out at perceived double standards in tennis doping investigations as he claimed the sport is being “kept in the dark” over the Jannik Sinner case.

Novak Djokovic believes that tennis is one of the cleanest sports but feels players have been "kept in the dark" regarding Jannik Sinner's doping case.