GSTAAD, Switzerland (AP) French Open junior champion Rebeka Masarova advanced to the quarterfinals of her first senior tour event, the Ladies Championship Gstaad in her native Switzerland on Friday.
The 16-year-old Masarova, ranked No. 797, won her second-round match 7-6 (2), 4-6, 6-2 against Anett Kontaveit, a 20-year-old from Estonia ranked No. 92.
Masarova debuted on the WTA Tour on Thursday by beating former No. 1-ranked Jelena Jankovic of Serbia in three sets.
In Saturday's quarterfinals, Masarova will play Annika Beck of Germany, who had two wins on Friday in the rain-affected clay-court event.
The fifth-seeded Beck beat Katerina Siniakova of the Czech Republic 6-2, 6-1 in the second round after completing a first-round win against Marina Erakovic of New Zealand.
Third-seeded Kiki Bertens of the Netherlands also won twice on Friday.