In 2017, Canada, once again without Raonic, lost for the second straight year in the first round of the World Group to Great Britain. Pospisil won his two singles matches over top 50 players Kyle Edmund and Dan Evans, but lost in doubles with Nestor against Dominic Inglot and Jamie Murray. 17-year-old Denis Shapovalov played the two other singles matches, losing the opener to Evans and the deciding rubber to Edmund. In the latter, he hit the match umpire, Arnaud Gabas, in the eye after launching a ball aimlessly towards the crowd in anger after dropping serve in the opening stages of the third set, defaulting the match and tie as a consequence. Canada then won in September a playoff tie over India by the score of 3–2, with wins by Shapovalov in singles and by Nestor and Pospisil in doubles, and will stay in the World Group for a seventh straight year.