Badosa already knows her first rival and Muguruza is her debut hour in San Diego

the American Louisa Chirico, number 196 in the world ranking, gave a surprise this Monday when she defeated her compatriot Alison Riske and met Paula Badosa in the round of 16 of the WTA 500 tournament in San Diego (California), where Colombian María Camila Osorio was eliminated in the first round.

Chirico, 26, came from behind Riske, world number 30, and won 1-6, 7-5, 7-6(5) to advance and face Badosa, number 4 and second favorite, who directly starts the tournament in California in the round of 16.

Badosa has faced Chirico once and defeated him with authority this year at Wimbledon (6-1 and 6-2).

The tournament for Colombian Osorio, number 73 in the WTA ranking, ended in the first round, losing 6-3 and 6-4 against Italian Martina Trevisan, after entering the main draw with victories over American Madison Kieg and the Chinese. Qinwen Zheng.

Trevisan will face Danielle Collins in the round of 16, who won 6-2 7-6(4) against French Caroline García. The winner of this match will be measured by one between Badosa and Chirico.

Positive start for American Madison Keys, who defeated Australian Ellen Pérez 6-1 and 6-4 and for the American Coco Vandeweghe, who won 6-1, 1-6 and 6-4 against Sofia Kenin to meet Jessica Pegula, fourth favorite, in the round of 16.

Bianca Andreescu closed the day defeating Russian Liudmila Samsonova of 7-6(1), 4-6, 6-2.

In its part, Garbiñe Muguruza will debut in the early hours from Tuesday to Wednesday (02:30 am) against Kazakh Elena Rybakinachampion at Wimbledon this year, and if she advances, she will cross paths with Polish Iga Swiatek, world number one and winner of Roland Garros and the US Open in her breakthrough season.

The contest also has the participation of Aryna Sabalenka, Maria Sakkari and Coco Gauff.