Japanese second seed Kei Nishikori got off to a winning start at the rain-delayed Citi Open on Tuesday, posting a three-sets win over American Donald Young in the second round.Nishikori, who had a first-round bye, prevailed 6-3, 4-6, 7-6(5) in a match that lasted just under two and a half hours at the Rock Creek Park Tennis Center in Washington D.C."I was able to play my game at the start but my opponent pinned me back with his quick tennis and I made mistakes in the second set," said Nishikori. "I was lucky at the end."Nishikori will face three-time champion Juan Martin del Potro of Argent…READ FULL ARTICLE