Zenit St Petersburg want £36m for Chelsea target Leandro Paredes.
Talks between the clubs opened last week though Chelsea fell short with their opening offer for the Argentine midfielder who returned for training on Monday after the Russian League winter break.
Chelsea's opening offer was £26.8million, as they look to replace the departing Cesc Fabregas.
Paredes signed for Zenit from Roma for £24million in 2017.
Leandro Paredes has scored seven times in his 43 matches for Zenit St Petersburg. He's also previously played for Empoli on loan, Roma, Chievo, and Boca Juniors.