Roddick injured, retires from Open

SHANGHAI: A bad season continued on Tuesday for Andy Roddick as the American was forced to retire after injuring his knee in a second-round match at the Shanghai Masters.
Swiss Stan Wawrinka advanced 3-4 after Roddick hurt his knee at 40-all in the eighth game and immediately went to his chair.
The fourth seed was joined by ATP trainer Michael Novotny and a doctor, with Roddick stretched out on his stomach for treatment before giving up and shaking hands after 36 minutes on court."The pain is at the back of the (left) knee, and it's enough to make me stop a tennis match. My concern now is to find out what we are dealing with," said Roddick after leaving court.
"I'll go back to the States and get it looked at. I'm lucky regarding qualifying for (the World Tour Finals) as I do have a bit of a cushion. But my main concern is dealing with this," he added.