The Blues, Manchester United and Manchester City are all believed to be chasing Fabregas.
"At the moment there's nothing official and he's a Barca player," Azpilicueta said of the ex-Arsenal skipper in the Express.
"All I can say is what I already know about him. He's a great central midfielder with plenty of experience in the Premier League. The best players are always welcome at the best clubs.
"In my personal opinion, he's a special player.
"Few teams have this kind of player in their team, a central midfielder who gets forward really well and has great vision of the game, whilst there's also his statistics, which speak for themselves.
"He can adapt to various positions. Right now, we don’t have a player like Cesc at Chelsea."