John McEnroe (L) of the United States shakes hands with Bjorn Borg of Sweden during the Venetian Macao Tennis Showdown in Macao, south China, Nov. 20, 2008. Four famous tennis players of different ages, namely Roger Federer of Switzerland, James Blake and John McEnroe of the United States, and Bjorn Borg of Sweden took part in the showdown. [Xinhua]