But the Russian was never able to get a look in on Vandeweghe's serve. The American survived a tricky service game at 3-2 and held with an ace, and then held at love once more to lead 5-3. In the next game, Vesnina's double faults returned, and she hit two in the game, including one down set point, to give Vandeweghe a one-set lead.
Vandeweghe did not face a break point in the first set, as her serve never deserted her in the opening frame. But she swiftly found herself in trouble in the first game of the second set, staving off two break points before rallying to hold.
Vesnina began to find her passing shots as well, and hit a successful one off the backhand side to give her two more chances to break for a 3-2 lead. But Vandeweghe again deployed her power game to great effect, erasing those opportunities with an ace and a forehand winner, and took the 3-2 lead herself.
From there, Vesnina struggled. Serving at 3-2, a dire drop shot miscue on the first point set the tone, and she quickly dropped her serve at love. Two games later, a spectacular backhand crosscourt winner by Vandeweghe gave the second seed double match point, and she clinched victory on the first one via a wide Vesnina backhand.