David Luiz has added his voice to the growing discontent within the Chelsea dressing room by warning Frank Lampard he should not expect preferential treatment from manager Andre Villas-Boas.

Lampard has previously expressed his disappointment at the number of games he has missed this season and admitted his relationship with the Blues boss had "not been ideal".

Nevertheless, Luiz cautioned the Chelsea midfielder that he was an employee of the club and should not be treated any differently from the rest of the squad.

"No one has to be someone's father or son in a football club," Luiz told Portuguese newspaper O Jogo - via the Telegraph.

"There are no privileged people there. He [Lampard] simply has to listen to the coach when he gives orders and take them.

"No player can forget that they are just an employee of the club."

And Luiz, who has been linked with a summer move to Barcelona, insists he remains committed to Chelsea and to Villas-Boas.

"Last season, there were teams who were in a poor position in the table, and no one talked about it," he said.

"It is a lot easier to talk about Andre, because Chelsea are a big team who always fight for the first place. And when they are third or fourth, it gets easy to slam the coach.

"But Andre has an immense capacity, he is an excellent person and I am sure he will have a great future at Chelsea."

The 24-year-old has been criticised for his erratic defensive displays since making a £25m to Chelsea 13 months ago. But he remains adamant that he sees his long-term future in west London, despite reports linking him with a move to Barcelona.

"I would be lying if I said I know nothing,' he is quoted in the Daily Mail.

"I am aware, not least because for months there have been constant rumours about Barca's interest. What I can confirm is that I have not negotiated anything and no-one has submitted a concrete offer. I am 100 per cent a Chelsea player.

"Barca are a great team that play fantastic football. Every player would love to play for Barcelona, but I am with Chelsea and I have an obligation to my club."