Tennis star Andy Roddick is cruising in Atlanta.

Andy Roddick says his recent struggles on the
court are the result of a mild case of mononucleosis.

Roddick lost in the third round at Washington on Aug. 6, saying
afterward that he didn't feel right. He withdrew from the Rogers
Cup in Toronto and had blood tests to figure out why he was
sluggish. He said Saturday that one of the tests came back positive
for mononucleosis -- a mild case.

Roddick's doctors told him he's probably had it for the last
couple of months and should be just about over it. He practiced
Saturday in preparation for the Cincinnati Masters next week.