Holders Manchester United must beat Portuguese champions Porto in their own backyard if they are to reach the Champions League semifinals after a compelling 2-2 first leg draw at Old Trafford on Tuesday. Carlos Tevez had looked to have secured United a crucial victory four minutes from time after being sent on as a substitute. But the Premier League leaders had reckoned without Porto’s magnificent fighting spirit that saw Mariano snatch a dramatic equaliser after 89 minutes
