Two-time champion Simona Halep advanced to her fourth National Bank Open final after producing a stunning comeback against Jessica Pegula in the semifinals. Simona Halep advanced to the final after registering a strong comeback win 2-6, 6-3 6-4 against Jessica Pegula of America. 

Halep had to work hard from the baseline, with her reliable backhand breaking down often. But Halep shifted the gears early in the second set. Finding more compatible depth and using more spin to kick the ball out of Pegula's strike zone, Halep broke the American twice to build a 4-1 lead. Serving at 4-2, Halep saved four break points to maintain her break lead.