World No. 8 Kei Nishikori defeated Spanish veteran David Ferrer 6-4, 6-3 on Thursday to advance to the men's singles quarterfinals of the Madrid Open tennis tournament for the fifth straight year.In the third-round match that was interrupted by rain after the first game of the second set when the chair umpire ordered the retractable roof to be closed, the Japanese sixth seed showed no signs of having sat out a month and a half due to a right wrist injury."I knew I was playing against an opponent I had to be aggressive against from the start," Nishikori said after denying 35-year-old Ferrer,…READ FULL ARTICLE