Roma director Mauro Baldissoni says they retain hope of finding a new signing this week.
But he insists the squad is strong enough to win the title.
Baldissoni said: “I read things, but I don't know if they are true or not. We try not to comment on transfer gossip, but if there is an opportunity to improve the squad, then we will try to take it," the director told Mediaset Premium when asked if Sassuolo are ready to release Gregoire Defrel.
“If we are to add anyone to this group, it has to be someone functional and ready to make a difference, otherwise we'll stay as we are.
“We want to grow and improve to become protagonists. I think we are already are protagonists, but obviously we want silverware too. Challenging for silverware is what we are aiming for and it has to become our obsession.
“Fortunately there's no such thing as a unbeatable team. Juventus start with advantages, they did in previous seasons and do now. We've achieved nothing yet, but at the same time nothing is out of reach either."