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.

Grand Slam season kicks off at the Australian Open, tennis remains gripped by lingering questions over doping, with Jannik Sinner and

World number one Jannik Sinner said Friday he did not know when the highest court in sport will deliver its verdict as ATP chairman Andrea Gaudenzi stressed the Italian's doping case was "run by the book".

ATP chairman Andrea Gaudenzi has insisted Jannik Sinner's doping case was "run by the book" with no preferential treatment, and expressed confidence that tennis would survive should the Italian be banned.

"Jannik Sinner should be suspended because every athlete is responsible for what goes into his body," Sorgal began. "In the event of acquittal, the entire anti-doping system would make itself ridiculous in the eyes of the world," he added.