The 22-year-old Italian star was set to make his Olympic debut this week in Paris. Here's why he won't be there.
Tennis star Coco Gauff, 20, the defending U.S. Open champion, will be the women's Olympic flag bearer.
The 30-year-old is one of five women representing the U.S. in tennis at the Olympic Games.
The Italian has contracted tonsilitis and has withdrawn just a couple of days before starting his campaign in Paris