Puerto Vallarta Open: Pera books moves into last 16
The American will play countrywoman Varvara Lepchenko in the next round

American Bernarda Pera, the No 4 seed, advanced to the last 16 of the Puerto Vallarta Open by beating Mexican wildcard Fernanda Contreras Gomez 6-1, 6-4 on Tuesday.
Pera, ranked No 84, will face Swiss Rebeka Masarova next.