United go ahead when keeper Dida can only parry Cristiano Ronaldo's powerful header from Ryan Giggs' corner into his net

Cristiano Ronaldo gets his head to the corner and then Gabriel Heinze's challenge forces Dida into the mistake

Ronaldo shoots as the home side look to compensate for their defensive injury problems by keeping the action in Milan's half

But United's shortcomings at the back are exposed when Kaka bursts past Heinze to slot home the equaliser on 22 minutes

Worse follows for United when Kaka puts Milan ahead after a mix-up between Heinze and Patrice Evra

Wayne Rooney levels in the second half by nudging the ball past Dida after being cleverly set up by Paul Scholes

And Rooney's injury-time strike gives United a 3-2 victory and a great chance of reaching the Champions League final

Old Trafford erupts - a draw in Milan in the second leg would be enough to take United through to the final in Athens