Cascarino gave an insight into transfer talk within international football amid rumours linking Jack Grealish, Harry Kane and Jadon Sancho with big-money moves away from their respective clubs.
And, in doing so, he recalled how former Man United manager Ferguson tried to lure Zidane to Old Trafford.
The ex-Aston Villa and Chelsea striker insists the England dressing room will be full of transfer chat, with players teasing their teammates about their futures.
He went onto call Ferguson the 'king' when it comes to transfer chatter.
On some of England stars being linked with summer transfers, the talkSPORT pundit said: "International football was full of transfer talk, especially in the boring hours of a locked room and speculation that you might be moving somewhere else.
"It was rife, and I can't imagine it's any different today, why would it be?
"This is a big time of the season for players, the transfer window, especially if you're playing well.
"Harry Kane, Jack Grealish, Jadon Sancho, and a good few others!
"They'll all be having conversations about it, and it isn't all in depth and it isn't disruptive for the squad, but they'll be talking about it."
Cascarino, who left England for France to play for Marseille and Nancy near the end of his playing career, then revealed how Ferguson asked him to 'have a word' with Zidane during a testimonial match.
He continued: "What some managers do, and I'll tell you Fergie was the king at this, he'd always somehow find a way to send a message to somebody.
"I was in a dressing room and met Sir Alex in Marseille, he was my manager for a day in a testimonial, I'm in a dressing room as he says to me, 'how's your French?'
"I said, 'it's ok', and he said to me, 'have a word with the number ten' and that number ten happened to be Zinedine Zidane!"
Featured Image Credit: PA
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