Chelsea and Juventus remain in talks over a Maurizio Sarri compensation package - with any deal set to trigger a move for Frank Lampard.
Juventus are trying to negotiate a deal without the need for compensation, but Chelsea are holding out for the majority of the final year of Sarri's contract, worth around £5.3m.
Any agreement for the 60-year-old to head back to Italy will then prompt an official approach from Chelsea to Derby for permission to speak to Lampard about becoming Roman Abramovich's 12th manager in 16 years.
Derby have not yet received any approach for Lampard, Sky Sports Newsunderstands.
Lampard said he would discuss his future with Derby after the club failed to win promotion to the Premier League following their play-off final defeat to Aston Villa last month.
"I'm not interested in the speculation," he told Sky Sports after that match.