Roddick battles to beat Blake

Andy Roddick fended off fellow American James Blake in a pair of tie-breaks to reach the third round at the Winston-Salem Open.

Former US Open champion Roddick, who triumphed at Flushing Meadows nine years ago, is battling to regain a top-20 ranking and was pushed hard by Blake before tying up a 7-6 (8/6) 7-6 (8/6) victory.