by Randy Walker @TennisPublisher Ultimate-set tiebreakers have been the talk of the U.S. Open with Lucas Pouille defeating Rafael Nadal 6-1, 2-6, 6-4, 3-6, 7-6 (6) in the fourth round of men’s singles and Karolina Pliskova beating Venus Williams 4-6, 6-4, 7-6 (3) in the fourth round of women’s singles. I have been tweeting […]