The Brazil international said that Chelsea’s Portuguese manager encourages his players to be open and honest on the pitch.
Luiz feels that this freedom to criticise team-mates has been one of the main reasons behind the recent change in fortunes at Stamford Bridge.
“We have complete freedom on the pitch to give our opinions, and to speak out - even to the extent of criticising our team-mates harshly,” he told The Sun.
“We were not having such a good spell recently, but now nobody talks about that.
“That is the product of our attitude and confidence. We all have independence within the squad."
Chelsea’s momentum was halted slightly on Saturday, as they were held to a 1-1 draw at Wigan.
Despite this disappointing result, Chelsea have looked a far better outfit since they secured qualification to the Champions League last 16.
That win was followed by the defeat of Manchester City – the league leaders first defeat of the season.
Luiz has been heavily criticised in the past couple of months, most notably by ex-Manchester United defender Gary Neville.
That criticism led to a high-profile exchange of words through the media between Andre villas-Boas and Neville.
The 24-year-old joined Chelsea from Benfica in the January transfer window for a fee of around £24million.