London, Oct 10 (Reporter) Rafael Nadal, the 22-time Grand Slam champion, will retire from tennis at the end of this season, the BBC reported. The 38-year-old will make his final appearance for Spain at November’s Davis Cup Finals in Malaga. In a video message released on his social media handle on Thursday, Nadal said: "I am here to let you know I am retiring from professional tennis.” "The reality is that it has been some difficult years, the last two especially,” he said...////...