There "could have been better communication" in explaining the rules involved in Jannik Sinner's doping case, ATP Tour chairman Andrea Gaudenzi acknowledged Thursday. However, Gaudenzi said at the ATP Finals that anyone hinting that a double standard was applied because of top-ranked Sinner's status is "unfair because the rules have been the same.

Jannik Sinner became the first player to reach the semifinals at the ATP Finals after Taylor Fritz defeated Alex de Minaur. Sinner, who faces Daniil Medvedev next, has already secured his place in the last four.

The chairman of the ATP Tour acknowledges there "could have been better communication" in explaining the rules involved in the doping case of top-ranked Jannik Sinner.