In the semi finals of the Duleep Trophy,on monday, star cricketer Yuvraj Singh smashed a double century to guide North Zone to 451 against Central Zone.North Zone started the second day at 346 for four with Yuvraj batting on 133.He made 75 more runs before he was caught. In response, Central Zone were 146 for 5 at close of play.Yuvraj Singh has recently recovered from a rare germ cell cancer.