The Brazilian defender stated that he is fully committed to the Blues, but noted that the prospect of playing at Camp Nou is attractive for every player
The 24-year-old centre-back is reportedly an option for the Catalan club in case they fail in their efforts to lure Thiago Silva away from AC Milan.
Luiz conceded that he is aware of speculation surrounding his future but noted that he has not yet been contacted by Barcelona or any other club.
"I would be lying if I said I know nothing about it," he told Sport. "I am aware, also because there have been continuous reports for months about Barca's possible interest.
"What I can say is that there have been no negotiations and no one has made a concrete offer for me.
"I am 100 per cent a Chelsea player."
However, when asked for his opinion about the Blaugrana, the Brazilian defender admitted that Barca are an appealing club for many players.
"They are a great team who play fantastic football," Luiz noted. "Every footballer would be delighted to play for Barcelona, but I belong to Chelsea."
Since November, Goal.com has been publishing exclusive extracts from Graham Hunter's highly-anticipated new book, 'Barca: The Making of the Greatest Team in the World'. The very last extract looks at Andres Iniesta's risky return from injury in the 2009 Champions League Final and how he was described by Wayne Rooney as the 'best midfielder in the world'. Don't miss it!