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.

There "could have been better communication" in explaining the rules involved in Jannik Sinner's doping case, but no double standard was applied, ATP Tour chairman Andrea Gaudenzi acknowledged.

There “could have been better communication” in explaining the rules involved in Jannik Sinner’s doping case, ATP Tour chairman Andrea Gaudenzi acknowledged Thursday.

He’s got a stranglehold on the No. 1 ranking. He’s unbeaten this week and hasn’t dropped a set. And his home Italian fans can’t get enough of him. Things couldn’t get much better for Jannik Sinner at the ATP Finals so far — despite an ongoing doping case that likely won't be decided until early next year.

Taylor Fritz boosted his hopes of reaching the last four of the ATP Finals with a comeback victory against Australia's Alex de Minaur. De Minaur needed to defeat the American fifth seed in straight sets for any chance of progressing to the semi-finals in Turin, Italy.