A day after questioning the lenght of the ATP tennis tour, 4th seed Andy Roddick has limped out of the Shanghai Masters after retiring in his second-round match against Stanislas Wawrinka.
The 27-year-old American injured his knee while leading 4-3 in the first set.
Roddick has not yet qualified for the World Tour finals in London next month.
Yesterday Roddick called for the ATP to allow top players a break in the season or risk curtailing the careers of players like Roger Federer and Andy Murray, who are absent from Shanghai because of fatigue and a wrist injury respectively.
