Djokovic, Federer humbled at US Open | CNNWorld number one Novak Djokovic has sensationally been knocked out of the US Open. The 2011 champion was beaten in the semi final in four sets by Japan’s Kei Nishikori 6-4, 1-6, 7-6 (7-4), 6-3 in what must go down as one of the biggest shocks of the modern era. In staggeringly humid conditions Nishikori, who has been coached by former US player Michael Chang, burst out of the blocks and snatched t
