Tennis: Juan Martin Del Potro

Manchester City's Argentinian footballer Carlos Tevez (Front R) sits with football agent Kia Joorabchian, as they watch Juan Martin Del Potro of Argentina play against Roger Federer of Switzerland in a Singles match during the Barclays ATP World Tour Tennis Finals in London, on November 26, 2009. AFP PHOTO/GLYN KIRK (Photo credit should read GLYN KIRK/AFP/Getty Images)