Johanna Konta notched up her second win in as many days by beating Sofia Kenin 6-1 6-4 to reach the quarter-finals of the Silicon Valley Classic in San Jose.
Konta, who saw off Serena Williams 6-1 6-0 on Tuesday, will now face fourth seed Elise Mertens in the next round.
Her victory over Kenin came in two sets of 36 minutes each, with the Briton breaking the American's first service game for a 3-0 lead then again for 5-1.
The world number 48 saved a break point and served out the set.
A break to love in the fifth game of the second set was enough to seal the match in straight sets.