Chelsea's talks are ongoing over a £45m move for Nathan Ake but Manchester City want to secure a replacement first.
Red Bull Leipzig's Josko Gvardiol has been mentioned as a possible replacement for the Dutch international - but is likely too expensive this to secure this window.
The Blues could be on the verge of a double signing from the Etihad - having also agreed a £50million deal for England international Raheem Sterling.
Thomas Tuchel's side are hopeful in securing a deal for Ake, Pep Guardiola’s fourth-choice central defender, after the departures of Antonio Rudiger and Andreas Christensen.