​Former ​Chelsea midfielder and current ​Derby County manager Frank Lampard has insisted that ​Manchester United's Jose Mourinho is a big boy and can handle himself but has said the players need to buy into his ideas.

Lampard played under Mourinho and was one of those who was affected when he left the club at the end of the Portuguese man's first stint at the London club. However, Lampard, who recently knocked out Manchester United in the Carabao Cup via the penalty shootout, has insisted that Mourinho can handle himself.

"Everyone knows my feelings for Jose Mourinho as a manager," said Lampard, according to ​Goal.

"It is a tough moment. It is a moment that we will all have, that I will have at times, that every manager has. I have heard all his interviews lately. He is a big boy. He will get about doing his job. Of course I feel for him. They are not winning games and they want to be - it is Manchester United."

"In terms of players, it can be difficult. You need buy-in from your players and you need sometimes the right message to be coming out. I thought that as a player and I think it even more as a manager.

"And you need complete work rate on the pitch. I am not talking about individuals here, I am saying that is what you need."

United will face Valencia in the second game of the Champions League group stage, and will hope to stem the tide by getting all three points.