MADRID, Spain - Anastasija Sevastova continued her perfect run in the Mutua Madrid Open on Wednesday, easing past Lara Arruabarrena in straight sets, 7-5, 6-2.
The Latvian, 27, won the only previous meeting of the pair and was only briefly troubled in their third-round match after Spanish wildcard Arruabarrena rallied and brought the first set back to 5-5.
But Sevastova soon regained the upper hand, breaking to love before seeing out the first set.
The second set was more one-sided as Sevastova breezed through in just over half an hour.
Sevastova has made an impressive debut at the tournament and is yet to drop a set following wins against Zhang Shuai in the first round and second seed Karolina Pliskova in the second.
"I am very happy," said Sevastova. "It's my first time in Madrid and already I am in the quarters. I beat some good players - Lara had a good tournament here. I have been playing quite good on clay the last three weeks so I am feeling comfortable."
She now awaits Kiki Bertens in the quarterfinals, who beat Irina-Camelia Begu in straight sets, 6-1, 7-5.
"Kiki is a great clay court player," Sevastova added. "She played in the semifinals in Roland Garros last year. I practiced with her and know she is a good player so it's going to be tough."