US Open runner-up Leyla Fernandez cruised into the second round of the Monterrey Open after a straight-sets win over Anna Karolina Schmiedlova on Monday.

Monterrey Open defending champion Fernandez won 6-2 6-2 over the Slovakian, with the Canadian second seed dominant in all aspects as she triumphed in one hour and eight minutes.

In the longest match of the day, fourth seed Sara Sorribes Tormo needed more than three hours to edge Kamilla Rakhimova 7-5 6-7 (2-7) 6-1.

Fifth seed Camila Osorio defeated Magdalena Frech 6-3 7-6 (8-6), while Briton Heather Watson won 6-3 2-6 7-6 (7-4) over Jule Niemeier.

Harmony Tan, Marcela Zacarias, Viktoriya Tomova and Beatriz Haddad Maia were other winners on Monday.