Manchester United boss Sir Alex Ferguson says Wayne Rooney is out of Sunday's clash at Blackburn Rovers.

Ferguson confirmed the striker's unavailability this morning, less than 48 hours after England frontman Rooney made a shock return to the team for the Champions League clash with Bayern Munich.

Ferguson has insisted Rooney did not suffer any long-term damage when he aggravated his injury against the German giants, who knocked out United on away goals.

But Ferguson is resigned to being without his star striker for the Ewood Park clash, although Rooney could return for the derby against Manchester City on April 17.

"We won't have Wayne for Sunday," confirmed Ferguson. "It is nothing serious, as we said the first time he got the injury.

"I think he will be ready for the Manchester City game because we have more time to work on it."