Great thing by the Argentina's Juan Martin del Potro in Los Cabos. While he was training on Wednesday, the world No. 4 stopped to sign an autograph and then continued his practice, getting applauded by the passionate Mexican crowd. He opened his campaign beating the world No. 446 and American player Marcos Giron in straight sets, 7-5 6-3, reaching the quarter-finals for the first time here at the event. Delpo will then move to Toronto next, Cincinnati and US Open.