Man Utd 1 Celtic 0
69,591 United and Celtic supporters hailed Roy Keane's last appearance at the Theatre of Dreams.
23,000 Celtic fans showed how much Keane is revered in Glasgow, even though he has only been at Parkhead for five months.
As predicted, Keane, who made his entrance through a guard of honour from both sides accompanied by his five children, played 45 minutes for each side.
Paul Scholes and Ryan Giggs combined to set up Cristiano Ronaldo for the only goal of the game. Ronaldo took his 55th-minute chance with clinical efficiency.
It was a deserved success, given United, with Rio Ferdinand deployed in midfield in direct opposition to his old skipper, dominated the opening stages, with Giuseppe Rossi, Louis Saha and Ronaldo all going close.
Another United old boy, Dion Dublin, was only denied an equaliser by a brilliant point-blank save from Edwin van der Sar, who, like Keane, had been introduced at half-time following Everton-bound Tim Howard's last Red Devils appearance for at least 12 months.
But this was Keane's night. And while there may have been at least one physical disagreement between the two biggest contingents of supporters in the British game, they were united in their acclaim of one of the finest talents Ireland has ever produced.