Now based in Newton-le-Willows, Duncan made the short trip from Ordsall to see an all-time classic...
I was a scrawny eight year-old squeezed into an electric Old Trafford. We couldn’t get into the Stretford End for that game, so we were stood near the corner flag (South Stand Lower).
I spent most of the game just looking at Maradona thinking, "I can't believe I’m actually watching Maradona!"
We needed three goals to go through, so when we went 2-0 up, you just knew we were going to score. Up popped Frank Stapleton... the place erupted and I remember Frank ran towards us spinning his arm around like a windmill!
People were jumping up and down, screaming and hugging each other. And when we went home after the game, people were singing all the way back to Ordsall (where we lived at the time).
The special thing for me was that I had been so excited about going to see Maradona, and yet it took me a few days afterwards to remember that he even played in the match. I'd forgotten about him, thanks to a fantastic performance from United players and supporters!