World number one Jannik Sinner may take time to hit his stride on his return from a three-month doping ban next month but will be in top form when he heads to the French Open, Italy's Davis Cup captain Filippo Volandri said.

Serena Williams has highlighted the perceived double standards surrounding men’s world No. 1 Jannik Sinner’s doping ban, saying in a new interview with Time magazine that she would have been suspended for 20 years for a similar offense.

Serena Williams has claimed she would have been banned for 20 years if she had failed a drug test like Jannik Sinner. The men’s world No 1 is serving a three-month suspension from tennis after twice testing positive for performance-enhancing drug clostebol in March last year.