EASTBOURNE, Great Britain - No.5 seed Jelena Ostapenko surged into her first Nature Valley International quarterfinal, dispatching Mihaela Buzarnescu, 6-1, 6-2.

"It was another great match for me," she said during her on-court interview. "I played well and served well. Some moments were tough because she can be so solid and not miss anything. But I'm very pleased with the game I played today."

The Latvian is yet to lose a set in Eastbourne - having kicked off her week with a decisive win over former World No.15 Kaia Kanepi - and finished off the fast-rising Romanian in exactly one hour on Court 1.

Buzarnescu has been in solid form thus far in 2018, reaching the Nature Valley Classic final last week in Birmingham, and beat Ostapenko at the Qatar Total Open back in February, but struggled with a shoulder injury - taking a medical timeout at the end of the first set - which likely led to the 24 unforced errors she struck throughout.

"She has been playing well this season," Ostapenko said after the match. "I played against her in Doha and learned a lot from that match. I prepared well for this one, and tried to play aggressively today."

By contrast, the 21-year-old was in fine form, maintaining an impressive +7 differential (24 winners to 17 unforced errors) with her high-octane game and converted six of nine break point opportunities to edge into the last eight.

"I prepared so well for the match. I know how she plays and I knew I had to play my best. I went on court and showed what I can."

A junior Wimbledon winner back in 2014, Ostapenko reached the quarterfinals at the All England Club last year, pushing five-time champion Venus Williams through two tough sets on Centre Court. 

"It's my first event on grass this year. I enjoy my time on grass because it's so nice. I'm enjoying my week in Eastbourne and looking forward to my next match."

Up next for Ostapenko is 2012 Wimbledon runner-up and former World No.2 Agnieszka Radwanska, who advanced via walkover when Petra Kvitova was forced to withdraw due to a hamstring injury.

"I've played her a couple of times. I know how she plays, so it's going to be a tough match, but I'm going to prepare for it."

Ostapenko and Radwanska have played just once before, with the Pole winning in straight sets at the 2016 Connecticut Open presented by United Technologies.

"Hardcourts can be different, but grass courts can be faster or slower, depending on the conditions. For me, it's probably better for me to play her on grass because I might have more of an advantage on this surface."