Jannik Sinner Sends Message Before Facing Carlos Alcaraz in Cincinnati Open Final originally appeared on Athlon Sports. It comes as no surprise that the world No. 1 and No. 2 are back again for the Cincinnati Open final. Jannik Sinner faces Carlos Alcaraz on Monday for the title.

The latest chapter of the Jannik Sinner-Carlos Alcaraz rivalry took a stunning turn on Monday when world No. 1 Sinner retired in the first set of the Cincinnati Open final due to an unspecified health issue.

The two young champions, who met as teen-agers, are expected to face off at this year’s U.S. Open. A new book by Giri Nathan tracks their parallel ascent.