Andre Villas-Boas' club failed in a £40m bid to land the Croatian midfielder in the summer and Spurs are now offering him a new deal, says the Mirror.
But despite losing only one match under their new Portuguese manager, Gullit claimed: "The player Chelsea still need, for me, is Modric.
"They have great players all around the pitch but he has something Chelsea doesn't have at the moment. He is creative and dominates the passing game in the midfield - he could be like Xavi or Iniesta are to Barcelona.
"I was surprised Tottenham didn't accept £40m because they are known to sell their best players for good offers. I think Chelsea will try to sign Modric again in January and maybe this time they will get him."