Rio Ferdinand claimed that a tunnel between him and Robbie Savage had fallen to the ground.
But Welshman retorted that he had his own version of the story.
The two are now working together as pundits in BT sport, having been to the Manchester United game in the Champions League.
Ferdinand was in the studio when Savage was in the co-commentary.
United lost 3-1 to Paris Saint-Germain at Old Trafford.
Neymar opened the scoring just before Marcus Rashford’s heavy deflection, giving both teams a 1-1 lead at half time.
There was provocation from the visitors after Fred escaped with a red card when Leonardo Parades was beheaded.
Despite consulting with VAR, only one yellow card was rejected, and Neymar was outraged by the decision.
As the teams left for half time, the Brazilian and Scott McTomney said a few words.
The incident reminded Ferdinand of a similar situation with Savage when he was at Blackburn Rovers.
He said: “It was fun to go to the Fracus Tunnel.
“I think Robbie will be reminded of him when he returns to the commentary, and that’s what happened to him when I was in the tunnel with him.
“He stopped me on the way to Blackburn and bit the needle.
“I ran after him into the tunnel. He was on the floor before I knew it. He could not run away. He was on the floor.”
But Savage had his own way of telling the story, remembering things very differently, but doing better than co-coms.
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He said: “Mate he got there first. Different story.
“I texted him and said, ‘Tunnel line is coming, I’m going to bring you.’ Listen to the version of different events. He knows the real story.
“That’s why he often goes to the gym now.”