Jannik Sinner retired from his Cincinnati Open final against young rival Carlos Alcaraz after losing the first five games of the match and struggling with illness.
The World No 1 apologised and said sorry to the fans after pulling out from the final when he lost his third service game in a row to trail Alcaraz 5-0 in the first set. Alcaraz was crowned the champion in strange scenes as the final came to an end after just 20 minutes of action.
