"We’ve got a few surprises planned for the day, which the crowd should enjoy," he told the United Relief matchday programme.
"I used to be known for not giving penalties for either team at Old Trafford, but you might see a couple on Saturday!
“Old Trafford was always my favourite ground to referee at and I was lucky enough to cover more than 30 games there. It'll be great to be back this weekend."
As well as watching club legends and famous fans in action, supporters will be treated to performances from a number of chart-toppers during a pre-match concert. Pop princesses The Saturdays will be playing live before kick-off, as will rapper Tinchy Stryder, indie band The Hoosiers and legendary crooner Tony Christie. Britain’s Got Talent dance troop Flawless will also be on hand to entertain the crowd.
Order your tickets online or call 0161 868 8000. Prices start at £15 for adults and £5 for U16s. Turnstiles open at 12.30 BST, the concert starts at 14:00 with kick-off at 15.30.