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.

The men's world No. 1 could face a two-year ban. Here's what to know about the doping proceedings against him so far

Top-ranked tennis player Jannik Sinner will go to sport’s highest court in April for the World Anti-Doping Agency’s appeal that seeks to ban him from the sport for at least one year.

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.

Jannik Sinner has a date for the World Anti-Doping Authority (WADA) appeal into his doping case which could lead to him being banned from tennis for up to two years. The Court of Arbitration for Sport (CAS) has scheduled a behind-closed-doors hearing April 16 and 17 2025 at its headquarters in Lausanne,

John McEnroe has raised a criticism of the tennis system, proposing a solution, regarding the doping issues that involved Iga Swiatek and Jannik Sinner last year.

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 describes as probably the worst time in her life.

Zheng Qinwen isn't interested in speaking too much about Iga Swiatek's failed doping test or speculating about how the Pole may feel, simply stating that it was not her business and wishing the Pole all the best. On Friday, the Chinese tennis star and the world No. 2 held a practice session at Melbourne Park.

The World Anti-Doping Agency's appeal date has been revealed as the doping body seeks to ban Sinner from the sport for at least one year.

Jannik Sinner finds out when he will learn his fate over his drug test appeal - what comes next could be brutal.