In April, Wozniak won a crucial match over world No. 52, Jana Čepelová, at the Fed Cup World Group Play-offs to help Canada get its place in the World Group I, the first time ever for the country since the introduction of the new World Group format in 1995. At the French Open in May, Wozniak qualified for the main draw but lost in three sets to world No. 26, Sorana Cîrstea, in the first round, despite having a match point in the second set. At a warm up tournament for Wimbledon, the Premier-level Aegon Classic, she qualified for the main draw and reached the third round. She was eliminated by world No. 25, Kirsten Flipkens, in three sets. Wozniak qualified for her second straight Grand Slam at Wimbledon, but was defeated by world No. 10, Dominika Cibulková, in the first round. In August, Wozniak was awarded a wildcard for the Rogers Cup where she was eliminated by world No. 20, Sloane Stephens, in the opening round. She lost in the first round of the US Open to world No. 33, Kurumi Nara, at the end of August. Wozniak had to end her season prematurely to have shoulder surgery.