Juan Martin del Potro, who called time on his career in December, was quizzed over Jannik Sinner's doping case at the ATP 500 Brazilian Open in Rio de Janeiro.

Jannik Sinner has been dropped from an exhibition event in Las Vegas next month while he is serving a three-month ban connected to a pair of failed doping tests.

Jannik Sinner has accepted a three-month ban from tennis to settle a case which has lingered over the sport for months after he twice tested positive for a banned substance, the World Anti-Doping Agency (WADA) announced on Saturday.

The timing means the 23-year-old Italian won't miss any Grand Slam tournaments. The French Open, the season's next major, starts May 25.

Many in the tennis world are expressing skepticism with the process that led to Sinner's three-month suspension

Jannik Sinner, the world's top-ranked tennis player, is under scrutiny after reportedly practicing in Doha, Qatar, despite a three-month doping ban that prohibits him from training and competing.

Jannik Sinner of Italy celebrates winning match point during the ... [+] Semi-Final match against Novak Djokovic of Serbia in the Davis Cup Final at P

Former Wimbledon winner Marion Bartoli has expressed her annoyance at the fact that Jannik Sinner’s doping ban will not cause him to miss any Grand Slam tournaments. The World Anti-Doping Agency (WADA) announced last week that Sinner had been suspended from tennis for three months for failing two doping tests in March 2024.

The lawyer representing world number one Jannik Sinner has spoken out against claims by Novak Djokovic that the Italian had been treated with favouritism during his doping case, which was settled earlier this month - with the 23-year-old accepting a three-month suspension that will see him avoid missing a single Grand Slam.