Roddick v del Potro suspended

New York - Andy Roddick's fourth-round match against Juan Martin del Potro at the US Open has been suspended because of rain and is scheduled to resume on Wednesday.

Play was halted right after Roddick went ahead 1-0 in a first-set tiebreaker on Tuesday night. A little more than a half-hour later, the tournament called off play for the day.

Roddick, the 2003 champion at Flushing Meadows, announced last week the US Open will be last tournament of his career.

Other matches stopped in progress, also in the first, included defending champion Novak Djokovic against No 18 Stanislas Wawrinka, and No 8 Janko Tipsarevic against No 19 Philipp Kohlschreiber.

Earlier, four-time major champion Maria Sharapova's quarterfinal against No 11 Marion Bartoli was pushed to Wednesday, with Bartoli leading 4-0.