Chelsea are set to tell Derby manager Frank Lampard that star loanees Mason Mount and Fikayo Tomori won’t be able to face them in the EFL Cup.

Derby take on Lampard’s former club at Stamford Bridge for a place in the fifth round on October 31.

Mount and Tomori, who joined Derby on a season-long loan from Chelsea in the summer, have excelled at the Championship side so far and were key in their stunning League Cup win over Manchester United last month.

Rules of the competition state that loan players can play against their parent club — if they have permission.

Lampard has been in touch with his old club to ask if defender Tomori and midfielder Mount, who has been named in the England senior squad for the first time for the games against Croatia and Spain, can play at Stamford Bridge.

Speaking a few days ago about the situation, Lampard said: “For their careers, it will be great development but from the Chelsea side they want to win the game, just as we do. I will respect their decision whatever it is.”

Meanwhile, Eden Hazard has suggested that manager Maurizio Sarri will play a big role in whether he stays at Chelsea.

Hazard said yesterday that he is still dreaming about a move to Real Madrid, but added: “I want to win something with Sarri. We will think about what happens at the end of the season.”