Jannik Sinner pulled out of the US Open mixed doubles tournament shortly before it began Tuesday, a day after he retired in the first set of the Cincinnati Open final because he was feeling ill.

Jannik Sinner has withdrawn from the U.S. Open mixed doubles event, where he was going to partner Katerina Siniakova, a day after illness forced the world number one to retire five games into his Cin...

Sinner looked devastated courtside as seen below.