Kei Nishikori retired from his first match at the Barcelona Open on Wednesday just three days after contesting the Monte-Carlo Masters final with world No. 1 Rafael Nadal.Having received a first-round bye, Nishikori pulled out in the first game of the second set of his second-round match against Spain's Guillermo Garcia-Lopez, after losing the first set 6-3.Scheduled to compete in next month's Madrid Open, Nishikori said the withdrawal was a precautionary measure after experiencing pain in his right thigh among other areas of his body. "I felt pain in three different parts of my body whil…READ FULL ARTICLE