Tennis-Nadal out of Cincinnati Masters with knee injury

Aug 9 (Reuters) - World number three Rafa Nadal has

withdrawn from next week's Cincinnati Masters with a nagging

knee injury that prevented him defending his Olympic title at

the London Games, tournament organisers said on Thursday.

The 26-year-old Spaniard, who also pulled out of this week's

Toronto Masters, has not played since losing at Wimbledon in the

second round on June 28.

"Hi all, another message to announce something that

definitely doesn't make me happy but unfortunately I won't be

competing at the tournament in Cincinnati next week," the

11-times grand slam winner posted on his Facebook page.

"I am still not ready to play."

Despite winning a record seventh French Open title this

year, Nadal has fallen to third in the world rankings.

His knee condition is a worry for the Spaniard so close to

the Aug. 27-Sept. 9 U.S. Open, the year's final grand slam.

(Reporting by Frank Pingue in Toronto; Editing by Ken Ferris)