Vinci then reached her second quarterfinal at the Canadian Open by defeating Karin Knapp, qualifier Mirjana Lučić-Baroni, and Daria Gavrilova all in straight sets. She then succumbed to world No. 1, Serena Williams, in the quarterfinals 4–6, 3–6. She then lost to Anastasia Pavlyuchenkova in the first round at the Western & Southern Open, 3–6, 6–0, 2–6. Vinci qualified for the main draw at the Connecticut Open and easily defeated Eugenie Bouchard in the first round, 6–1, 6–0. She then was defeated in the second round by third seed Caroline Wozniacki, 6–4, 6–7, 7–6.