The two best male players in the world, Novak Djokovic, right, and Rafael Nadal will compete at the 2018 Mubadala World Tennis Championship. Reuters
The two best male players in the world, Novak Djokovic, right, and Rafael Nadal will compete at the 2018 Mubadala World Tennis Championship. Reuters

Rafael Nadal and Novak Djokovic one win from renewing US Open rivalry