Carlos Alcaraz won the Cincinnati Open after top seed Jannik Sinner retired as he was feeling unwell on Monday, raising concerns about the Italian's fitness just days before he is due to begin the defence of his U.

The highly anticipated final at the Cincinnati Open came to a sad ending on Monday as World No. 1 Jannik Sinner was forced to retire from the match against No. 2 Carlos Alcaraz while trailing 5-0 due to illness. With the result, Alcaraz wins his third Masters 1000 title of the season and his eighth overall in his storied young career.