Since Mata’s arrival from Valencia in August, Torres has found the net twice in six games after scoring just once in his first 23 games for the Blues.
When asked what affect Mata had on Torres, Villas-Boas told reporters: "I really don't know, I think we spoke about this before. We don't add in terms of nationalities for every player, for people to get involved socially outside of the pitch. We just add in terms of quality and talent.
"Eventually they got to know each other a little bit better now and of course they share social behaviour. It's nothing new that the French go more with the French people or the French-speaking people, and the Spanish and the Portuguese is the same.
"But it's not what we're looking for. What we're looking for is inter-relationships in the pitch and we hope for them to establish not only with a certain companion but with every single companion, with no kinds of bias. That's all we're looking for a team performance...not really any kind of double relationship."
When asked if he thought Torres had improved because of the arrival of Mata, he said: "[It has] Nothing to do with it, in my opinion."
The 33-year-old also revealed the Blues are no closer to agreeing a deal with Didier Drogba to extend his stay at Stamford Bridge however he did say there was an offer made to the Ivorian.
He added: "There's nothing new, and this is a situation where we cannot discuss every single week. I think it's better for us [if] when there is something to tell you, we will announce it.
"It's just like that. The offer is on the table and eventually we are dealing with the offer. End of story."
Villas-Boas admitted he faces a tough decision this week as to who makes his starting XI for the visit of Everton following the Blues 5-1 drubbing of Bolton last time out. However Fernando Torres is still suspended following his sending off against Swansea.
The Portuguese is delighted that competition for places in the Chelsea squad is so intense this early in the season.
"We have a decision to make every time, in every game. We're just confident in the work that we do and eventually, hopefully, we can choose the best 18 and the best starting XI as possible to take us through to another important win.
"Everybody is competing, of course, to the highest level, and we just have to make our choices."
When asked who will start up front, he said: "I haven't made a decision yet. Tomorrow as you know is the day when we prepare strategically for the game, so the players don't know about the decision and it would be unfair for me to say it before they know."
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