LYON thought they had sealed a priceless one-goal first-leg lead over Man United thanks to Karim Benzema's second-half strike.
But you can never rule out Sir Alex Ferguson's troops and when sub Carlos Tevez grabbed the leveller with just three minutes left the tie swung United's way.
With an away goal in the bag the Reds are now clear favourites.
But if Alain Perrin's star men such as Benzema, Juninho and Hatem Ben Arfa turn it on they could pull off a shock.
ODDS TO WIN IT: Man United 9/2, Lyon 40/1