It's nighttime in Flushing Meadows, New York. It's early-September and Roger Federer and Rafael Nadal are making their way into Arthur Ashe Stadium to do battle at the US Open. Over 22,000 fans pile in to be part of one of the greatest rivalries in sports. Tennis fans and non-tennis fans alike hold their breath during every stroke as the two giants battle it out. Flags are waving, bodies are painted and shouts of jubilation and frustration emanate off the court behind fist pumps and racket tosses as two of the most acclaimed athletes on the planet wage war.