Jannik Sinner has withdrawn from the U.S. Open mixed doubles event, where he was going to partner Katerina Siniakova, a day after illness ...

How deep can Emma Raducanu and Jack Draper go? Who will win the mens and womens titles? Pundits including Martina Navratilova ...

Jannik Sinner, the reigning Australian Open, Wimbledon and U.S. Open champion, looked uncomfortable in sweltering conditions.