By Ace Ramirez, EBC Sports International, Washington DC Bureau Heart and will prevailed over fatigue and exhaustion as 2nd seed Kei Nishikori did unbelievable match point saves to top American Tomy Paul in the Citi open quarter-final on Friday, August 4th. On the other court, fifth seed Alexander Xverev dominated Russian Danill Medvedev in less than an hour in the quarter-final securing a semi-final slot against Nishikori. Meanwhile American Jack sock faces South African Kevin […]