The ATP Tour said Thursday its Safe Sport initiative has flagged more than 162,000 abusive social media comments directed at players in its first year.

Carlos Alcaraz and Novak Djokovic will face potential difficult American opponents when they begin their quest for another U.S. Open title.

Nick Kyrgios withdrew from the U.S. Open on Thursday, the third straight year the Australian has missed the last Grand Slam tournament of the season.