Fans mingle outside Old Trafford before Roy Keane's testimonial between Manchester United and Celtic

Keane, who starts the game playing for Celtic soaks up the atmosphere, boosted by 23,000 Celtic fans, with his children

Despite the friendly build-up, the game is competitive and Keane cannot resist questioning an official's decision

Fellow United legend Ryan Giggs captains a strong Red Devils side, creating a chance for Giuseppe Rossi which is well saved

Keane tries to orchestrate another Celtic attack, but the first half ends goalless and the midfielder will now switch sides

The former Republic of Ireland star appears in the familiar United strip that he wore for 12 years to start the second half

The Celtic players do not hold back though and are keen to let Keane know that they will not roll over

But Cristiano Ronaldo races through and slides the ball under Celtic keeper Artur Boruc to put United in front

The Portuguese winger celebrates the goal, which is enough to clinch victory for United in front of 70,000 fans, with Keane

After the game, Keane chats with Sir Alex Ferguson who says he is the best player he's ever had at Manchester United

He then thanks the supporters and players for turning out before leaving the Old Trafford pitch for the final time