Andy Murray and Stefanos Tsitsipas lead Del Potro tributes amid retirement concerns
Andy Murray and Stefanos Tsitsipas have led tributes to Juan Martin del Potro after the 33-year-old admitted his career may be over. The 2009 US Open champion had been sidelined with a knee injury for almost three years but finally made his return at the Argentina Open on Tuesday night. After losing his opening match, Del Potro admitted it could be the final match of his career.


