Carlos Alcaraz won the Cincinnati Open title in a little more than 20 minutes on Monday after top-ranked Jannik Sinner was forced to retire because of illness during the first set.

Meeting in the final for the fourth time this year and first since Wimbledon, Sinner fell behind 5-0 in the first set with nine unforced errors. He was seen with an icepack on his head during a break and retired after playing just 22 minutes.

So very sad to see 💔<a href="https://twitter.com/carlosalcaraz?ref_src=twsrc%5Etfw">@carlosalcaraz</a> comforts a disappointed Jannik Sinner after the World No. 1 is forced to retire due to illness.<a href="https://twitter.com/CincyTennis?ref_src=twsrc%5Etfw">@CincyTennis</a> | <a href="https://twitter.com/hashtag/CincyTennis?src=hash&ref_src=twsrc%5Etfw">#CincyTennis</a

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