Gavrilova advances to second round in HK

Daria Gavrilova has battled her way into the second round of the Hong Kong Open with victory over Kazakhstan's Zarina Dyas.

Daria Gavrilova has advanced to the second round of the Hong Kong Open. (AAP)

Daria Gavrilova has battled her way into the second round of the Hong Kong Open on a day of mixed results for Australia.

Gavrilova, who reached the final of this tournament last year, came from a set down to beat Kazakhstan's Zarina Dyas 3-6 7-5 6-1.

However, there were defeats for Samantha Stosur, who went down to Japanese qualifier Nao Habino, and also Australian wildcard Priscilla Hon who lost to to top-seeded Russian Elina Svitolina 6-2 6-3.

Fourth-seeded Spaniard Garbine Muguruza gave herself a belated birthday present by defeated compatriot Sara Sorribes Tormo 6-3 6-1.

The 13th-ranked Muguruza, who turned 25 on Monday, has struggled since reaching the French Open semifinals in June.

Two weeks ago at Wuhan was the first time since the French Open that she played three matches at a tournament.