Japan's Kei Nishikori inched closer to his first masters championship on Friday, with a 6-4, 6-7(1), 6-3 quarterfinal win over Croat Marin Cilic.Cilic, who had won both of their two career finals, including the 2014 U.S. Open, had not lost to Nishikori since the 2015 Japan Open, but has now lost both their matches on clay. But this one was not easy despite Cilic hurting his right leg. The Croat rallied and fended off three match points before finally succumbing in the final set."It was a long match and I found it hard to maintain my concentration," Nishikori said after the 2-hour, 55-minute…READ FULL ARTICLE