Manchester United academy chief Nicky Butt admits he feared for his future when Juan Sebastian Veron arrived.
The Argentinian midfield maestro arrived at Old Trafford in a £28m deal in 2001.
"There have been superstars who've come to this club and can't live with it," he told The Times.
"Juan Veron comes to mind. Veron was the best player I've ever seen, except Cantona. In training he was like something I'd never seen.
"I was suspended against Everton [in 2001], he played and I sat there and thought: 'I'll never play for United again, that's me done, I'll have to get a move.'
"But as much as Verón was a great lad, and an unbelievable footballer, he didn't know what it meant to be a United player.
"He didn't know the feeling of the club. He couldn't handle the pace, the tempo.
"The fans didn't want the little rollovers, the technical outside of the foot passes. They wanted blood and thunder, give it to Peter Schmeichel, throw it out to Giggs, attack, attack, attack.
"Players need to know that."