Chelsea have made two changes to the side that beat Fulham in their last match, which came more than a week ago.
Surprisingly, Conor Gallagher drops to the bench, with Mykhailo Mudryk taking his place.
It’s a big night for Ben Chilwell, who makes his first start since September in place of Malo Gusto. That means Levi Colwill shifts to centre-back and Axel Disasi moves to right-back.
Carney Chukwuemeka is on the bench as he recovers from injury, and is joined by the in-form Noni Madueke.
Middlesbrough have made four changes from the side that drew with Rotherham at the weekend.
Rav van den Berg, Jonny Howson, Marcus Forss and Matt Crooks come into the XI.
Luke Ayling, Isaiah Jones, Finn Azaz and Sam Greenwood drop out.
Chelsea team news
Team to play Middlesbrough: Petrovic; Disasi, Silva, Colwill, Chilwell; Caicedo, Fernandez; Sterling, Palmer, Mudryk; Broja.
Subs: Bergstrom, Curd, Badiashile, Gilchrist, Gallagher, Chukwuemeka, Castledine, Madueke, Washington.
Middlesbrough team news
Team to play Middlesbrough: Glover, Van den Berg, Barlaser, Clarke, Fry, Hackney, Rogers, Howson, Forss, Crooks, Engel.
Subs: J.Jones, Gilbert, Dijksteel, McNair, Coburn, O’Brien. McCabe, Bridge, Bilongo.
