Sports US Open men’s final signals beginning of the end for tennis’ Big Three of Djokovic, Federer and Nadal September 13, 2020 Scott Gleeson, USA TODAY Comments Off on US Open men’s final signals beginning of the end for tennis’ Big Three of Djokovic, Federer and Nadal Either Dominic Thiem and Alexander Zverev will win his first Grand Slam title in a U.S. Open final that could foreshadow the future of men's tennis.