Mauricio Pochettino has confirmed that he visited Luke Shaw at home to check that the young Southampton defender was not eating too much pizza.
The story came up during an episode of The Overlap featuring Gary Neville, Roy Keane, Ian Wright and Jill Scott.
Neville asked Pochettino directly:
Is it true that at Southampton you used to go to Luke Shaw's house because he was eating pizza? Were you always checking that the players were eating properly?
Is that true or a myth?
Pochettino effectively confirmed the story:
Yes.
It's another thing we can be proud of.
Keane then made a joke at Shaw's expense:
I think he's still eating pizza.
You stopped him at Southampton, and now he's eating it in Manchester.
Keane then laughed and clarified that he was joking.
Pochettino worked with Shaw at Southampton after being appointed in January 2013, when the defender was just 17.
Shaw established himself in the first team under the Argentine before joining Manchester United for around £30 million in the summer of 2014.
The story has attracted fresh interest amid the possibility of Pochettino returning to the Premier League.
The 54-year-old has been linked with Manchester United amid uncertainty over Michael Carrick's future.
Pochettino is reportedly willing to consider an offer from Old Trafford if the club decide to change manager.
That could see him work with Shaw again, more than a decade after their time together at Southampton.
Shaw is currently recovering from an injury. He last played on 10 October against Tottenham and has yet to return to full training.