<p><br /> Sir Alex Ferguson insists Wayne Rooney did not suffer any long-term damage as Manchester United bowed out of the Champions League on away goals.<br /> </p><p><br /> Ferguson took a calculated gamble to risk Rooney's ankle injury against Bayern Munich at Old Trafford and confirmed afterwards his star striker had aggravated the problem during a 3-2 win that condemned United to an exit at the quarter-final stage.<br /> </p><p><br /> Rooney is now likely to miss Sunday's trip to Blackburn, the start of a five-match title run-in in which Ferguson believes his side cannot drop a single point if they are to stand any chance of retaining their Premier League crown.<br /> </p><p><br /> However, the United boss is confident his 34-goal forward will be fit for the derby trip to Manchester City on April 17.<br /> </p><p><br /> "He got a knock which was similar to last week," said the United boss.<br /> </p><p><br /> "It is a burst blood vessel below the ankle. He won't be out for too long."<br /> </p>
