Gadecki upsets Stephens in Guadalajara Open

GUADALAJARA, Mexico -- Olivia Gadecki upset 2017 US Open champion Sloane Stephens 6-4, 6-3 on Monday to move into a second-round contest against second-seeded Danielle Collins at the WTA Guadalajara Open.

Seventh-seeded Veronika Kudermetova beat Sachia Vickery 6-4, 6-4 and advanced to meet Camila Osorio, the 22-year-old Colombian who eased past Hailey Baptiste 6-3, 6-2.

Local favorite Renata Zarazua had a 6-1, 3-6, 6-1 win over Anhelina Kalinina, and Kamilla Rakhimova advanced to face No. 3 seed Victoria Azarenka with a 7-5, 6-0 victory over Aleksandra Krunic.

Top seed Jelena Ostapenko, who is coming off a US Open doubles title victory with Lyudmyla Kichenok following her first-round loss to Naomi Osaka in the singles draw, won't play until Wednesday.

The Guadalajara Open is a hardcourt 500-level event on the WTA Tour this season and is being played at the Complejo Panamericano de Tenis.

Gadecki upsets Stephens in Guadalajara Open

Gadecki upsets Stephens in Guadalajara Open

Gadecki upsets Stephens in Guadalajara Open

Gadecki upsets Stephens in Guadalajara Open

Gadecki upsets Stephens in Guadalajara Open