Chelsea vs Derby - Preview and possible lineups

Chelsea team news: Eden Hazard is out with a back problem, while Pedro is a doubt with stomach pains that forced him off against Burnley. Maurizio Sarri is expected to rotate his squad heavily.
Derby team news: Chelsea have granted Mason Mount and Fikayo Tomori special permission to play against their parent club so both will be available.
Chelsea assistant manager Gianfranco Zola on Lampard:
"He's a legend of the club. He's done so much for the club. We really wish him continuously well as a coach," said Zola.
"It's not a surprise for me he's doing well and he's going to do well in the new role in football. He's always had a great attitude towards the game, towards what has to be done to become good in the game."
Derby manager Frank Lampard on returning to Stamford Bridge:
"It's a special draw for me to be able to go back and see people behind the scenes and 40,000-plus friends in the stadium," said the 40-year-old ahead of the fourth-round clash at Stamford Bridge.
"I'm more emotional as I have gotten older, I think. These things catch you. Because you realise, in my life, how important Chelsea was and what I owe for that in terms of thanks."
Form:
Did you know?
Chelsea predicted XI: Caballero; Zappacosta, Cahill, Christensen, Emerson; Loftus-Cheek, Fabregas, Kovacic; Moses, Giroud, Hudson-Odoi
Derby predicted XI: Carson; Bogle, Keogh, Tomori, Forsyth; Huddlestone, Johnson; Bennett, Mount, Wilson; Marriott
Prediction: 3-1