Japan's Kei Nishikori powered past Philipp Kohlschreiber of Germany in straight sets Thursday to advance to the quarterfinals of the Italian Open.Nishikori, coming off a win against world No. 4 Grigor Dimitrov a day earlier, defeated the 28th-ranked Kohlschreiber 6-1, 6-2 in just over an hour, wrapping up the contest much faster than his earlier matches at the Foro Italico.With the victory, the No. 24 Nishikori is set to take on former world No. 1 Novak Djokovic in the last eight."I played almost perfectly (today)," Nishikori said. "But I know that (Djokovic) will be tough to beat. I get a …READ FULL ARTICLE