Former professional tennis player, Rennae Stubbs, and IBM’s Elizabeth O’Brien look at the difference between how far Novak Djokovic and Roger Federer have run during the 2015 US Open. To …
When previewing the US Open men’s final Novak Djokovic and Roger Federer look like mirror images. Their serving, returning and all-around game are very similar. With that being said Federer …