The contracts of David Luiz and Cesc Fabregas expire at the end of the season and Chelsea boss Maurizio Sarri is keen for both players to stay on at Chelsea beyond this season.
Both players have been in talks with the club over the last four weeks but Chelsea are yet to come to an agreement because of the policy of only giving over-30s one-year deals.
Fabregas and Luiz are both aged 31 and they want a long contract if they are to remain at Stamford Bridge.
“The deal is very difficult for this reason, I think,” Sarri said. “Because the club wants a short contract, and the players want a long contract. So it’s difficult for this reason.
“But I think, at the end, we can find a solution. I know very well that it is not easy but I think that we can do a new deal for both. They are very important players for us.
“It’s very difficult to find a centre back for this level, and it’s very difficult to find a central midfielder technically like Fabregas. And so I think they have to stay with us.”
Luiz has played every Premier League game for Chelsea this season while Sarri sees Fabregas as the backup to Jorginho in the deep-lying midfield role.