Agnieszka Radwanska, the top seed at the Nottingham Open in England, breezed into the quarter-finals at the expense of Russian qualifier Alla Kudryavtseva 6-0 6-3.
The former Eastbourne champ wrapped up the opening set within 20 minutes and lost only nine points.
There appeared to be a bigger gulf between the Polish world #13 than just over 100 world ranking places dividing the players. But Kudryavtseva gave Radwanska a scare in the opening game of the second set, forcing eight deuces but fluffing two break points.
On her own serve the Russian picked up her first game for the loss of one point to level matters, only to lose her serve in a marathon fourth game but saved three break points before trailing 3-1.
Radwanska had to fight hard for points to maintain the advantage, with the exception being the ninth and final game of the set when she served out to win without dropping a point. The Devonshire Park favourite faces American Christina McHale in the quarter-finals, who surprisingly saw off Australian Jarmila Gajdosova