Manchester City's Argentinian footballer Carlos Tevez (Front R) speaks 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)