The 19-year-old Marino advanced to the second round of the US Open before losing 7-6 (3), 6-3 to Venus Williams.

Americans Melanie Oudin and Bethanie Mattek-Sands also advanced. The fifth-seeded Oudin beat Georgia’s Anna Tatishvili 6-3, 6-0, and Mattek-Sands downed sixth-seeded Julia Goerges of Germany 6-1, 6-4.

In another second-round match in the indoor event at Club Avantage Multi-Sports de Quebec, third-seeded Lucie Safarova of the Czech Republic beat Sweden’s Johanna Larsson 6-4, 6-2.

Groth into Guangzhou quarterfinals

In Guangzhou, China, top-seeded Jarmila Groth of Australia rolled into the quarterfinals of the Guangzhou International on Thursday with a 6-1, 6-4 win over Tamarine Tanasugarn of Thailand.

The 55th-ranked Groth next faces unseeded Italian Maria Elena Camerin, who advanced Wednesday.

Also Thursday, unseeded Edina Gallovits of Romania ousted fourth-seeded Ayumi Morita of Japan 6-2, 4-6, 6-4 and Alexandra Panova outlasted fellow Russian Ksenia Pervak 7-5, 2-6, 6-0.