Picture this: you're down 5-6 in a final-set tiebreak, sweat is rolling down your cheeks and your legs are wearing thin. It all comes down to physical stamina. Who has a little more gas in the tank—and, perhaps, who has the better shoes?
It may seem trivial, but gear plays a crucial role in keeping up with the demanding physicality of the sport. Recently, Nike upped their on-court shoe game by combining tennis and basketball, and it's an overhead slam dunk.