Jannik Sinner will go into his Australian Open defence knowing a court hearing in Switzerland in three months could condemn him to a potential two-year ban from the game for doping.

Iga Swiatek, a self-described “control freak,” is taking new precautions — including holding on to extra samples of medicine she takes, in case they need to be tested at some point — after a doping case she described as “probably,

The topic of doping cases involving tennis players Jannik Sinner and Iga Swiatek remains a talking point as the 2025 Grand Slam season opens at the Australian Open.

It is a topic that shadowed tennis in 2024 and is still a talking point as the 2025 Grand Slam season opens at the Australian Open on Sunday (Saturday EST): doping and the cases involving Jannik Sinner — which is still not resolved — and Iga Swiatek.

As the Australian Open 2025 approaches, several key storylines are emerging. Jannik Sinner and Iga Swiątek are determined to overcome the lingering shadow of doping allegations that have overshadowed the sport.

Doping is a topic that shadowed tennis in 2024 and is sure to be a talking point as the 2025 Grand Slam season gets going at the Australian Open

It is a topic that shadowed professional tennis in 2024 and is still a talking point with the 2025 Grand Slam season set to open this weekend.

Iga Swiatek, a self-described "control freak," is taking new precautions after a doping case she described as "probably, like, the worst time in my life." Jannik Sinner, meanwhile, acknowledged that his on his mind entering the season's first Grand Slam.

Jannik Sinner and Iga Swiatek were both able to go for months last season without anyone knowing what was happening behind the scenes and that they'd failed doping tests.