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.

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.

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.

Aryna Sabalenka of Belarus plays a forehand return to Zheng Qinwen of China during the women's singles final at the Australian Open tennis championships at Melbourne Park, Melbourne, Australia, Saturday, Jan. 27, 2024. Credit: AP/Andy Wong

As Aryna Sabalenka prepares to launch her quest for a third straight Australian Open title, Iga Swiatek knows how her rival is likely to be feeling.