Japan's Kei Nishikori and Naomi Osaka were both knocked out in straight sets in the first round of the Rogers Cup on Tuesday.In the men's singles at Toronto's Aviva Centre, Nishikori was defeated 7-5, 6-1 by world No. 39 Robin Haase. The Dutchman's serve proved the difference as he put 11 aces past the former world No. 4.Nishikori, currently ranked 22nd, took three straight games in the first set to book an early lead but imploded in the fifth game with three double faults."I made a lot of mistakes," Nishikori said. "I broke him early in the first set and might have advanced had I extended …READ FULL ARTICLE