Doping has been in the spotlight since
Simona Halep tested positive for a banned substance and information about other players has been making the rounds.
While no other high-profile player like Halep tested positive, plenty were tested over the years with numbers now coming out. According to reports in Greece, Tsitsipas and Sakkari were tested a lot of times in the past few years with Tsitsipas passing the test 85 times and Sakkari 84 times.
Many other players were tested multiple times as well and it's standard practice for tennis players. Punishments are severe and it's really hard to clear your name with your reputation taking a hit regardless. For a tennis player that would be a catastrophe.