As the tennis world prepares for the U.S. Open, the races to be ATP and WTA world No. 1 are getting interesting in Cincinnati.

Jannik Sinner has a new partner for the U.S. Open mixed doubles tournament, where Emma Raducanu and Carlos Alcaraz will face the No. 1-seeded team in the first round.

A ruthless Iga Swiatek won 10 of the last 13 games to beat Elena Rybakina 7-5 6-3 on Sunday and reach her first Cincinnati Open final after losing in the penultimate stage of the U.S. Open tune-up event in each of the last two years.

Iga Swiatek continued her strong summer by defeating Elena Rybakina 7-5, 6-3 on Sunday to reach the final of the Cincinnati Open, where she will face Jasmine Paolini, a 6-3, 6-7 (2), 6-3 winner against Veronika Kudermetova.

Cincinnati Open volunteer Phil Carver adopted the puppy that Jannik Sinner met after a match. Later, Carver got to meet Sinner at his birthday party.

Aryna Sabalenka's Cincinnati Open title defense is over. The World No. 1 was eliminated by Elena Rybakina in the quarterfinals Aug. 15.

Jannik Sinner enters the event paired with Katerina Siniakova in a new format designed to platform the biggest stars.

Gabriela Dabrowski and Erin Routliffe defeated Guo Hanyu and Alexandra Panova 6-4, 6-3 in the Cincinnati Open doubles final to claim their first WTA 1000 title as partners. Dabrowski and Routliffe have now won a Grand Slam title,