Chelsea boss Jose Mourinho says Arsenal and Manchester City target Kevin De Bruyne has to change his mentality if he is to be a successful player in the English Premier League.
The Belgium international left the Blues after struggling to secure a regular place at Stamford Bridge.
And Mourinho says securing a regular place in a top team in England will always be a daunting task.
"I wanted to keep him," Mourinho is quoted as saying by The Guardian.
"And he told me it was not in his personality to be competing for a position in the team. He needed a team where he knows he can play every game. He needs to know that he is important.
"He did not want a team where he thinks am I playing or not? He needs that trust, he needs that quality. He needs that security. So I was not happy when he left. So yes it's not fair.
"He didn't tell me he couldn't handle the pressure.
"He told me he wanted to play every weekend. I told him this is Chelsea, you are very young, you have Eden Hazard, you have Mata, you have Willian, you have Schurrle, and I cannot promise you that.
"And the first game of the season against Hull City he played. For the second game against Manchester United, he played.
"The third game of the season was the Super Cup in Prague, I decided not to play him. For the fourth match, in the Premier League, he was on the bench. And he was not happy. He told me he was not happy.
"He was not training very well and he was saying: 'I can't give you more. This is just my way.'
"So yes, I accept that if this is his mentality and it's his choice to go, it is better for Chelsea to make a good deal.
"Chelsea made a good deal and he was happy to go and I am happy because the kid is a good kid. And I am happy for him
"Players have different circumstances. We sold him, made our money and it was fantastic because we bought him cheap and sold him for a fantastic price.
"And now Wolfsburg, if they make a fantastic deal, that is good for them."
