The incident in the last frame proved controversial as the referee replaced the cue ball in the wrong position, giving Liang a better sight of the yellow. At the time, Swail nodded his assent to the referee, but he complained in a post-match interview that Liang had behaved unprofessionally by not pointing out the referee's error. Commentators countered that Swail should have queried the placement of the ball before Liang took his shot, and that, given the tension of the situation, Liang could be forgiven for not thinking clearly.