Graham Potter has made two changes to the side that defeated RB Salzburg in midweek, with Mason Mount returning to the team.
Brighton vs Chelsea lineups
is the other man to return to the starting XI, replacing Jorginho.
Kepa is the only player to play every single minute under Potter since his arrival as head coach and he retains his place between the posts this afternoon.
Trevoh Chalobah, and Marc Cucurella are the three defenders in front of the Spaniard, meaning we are unchanged in defence for the third successive match.
Sterling, Havertz and Gallagher all keep their starting spots. Havertz starts in the Premier League for the 50th time this afternoon, while Gallagher starts for the second successive match after impressing on his first Champions League start in midweek.
, who turns 19 years old today, is involved in our matchday squad for the first time. Carney Chukwuemeka misses out completely.
Chelsea: Kepa, Chalobah, Thiago Silva (c), Cucurella, Pulisic, Kovacic, Loftus-Cheek, Sterling, Mount, Gallagher, Havertz
Subs: Mendy, Azpilicueta, Chilwell, Jorginho, Zakaria, Hutchinson, Ziyech, Broja, Aubameyang
Brighton also make two changes to the side that lost at Manchester City a week ago.
Brighton: Sanchez; Dunk (c), Webster, Estupinan, March, Mac Allister, Caicedo, Trossard Gross, Mitoma, Lallana
Brighton vs Chelsea injury updates
Chelsea will be without long-term absentees N'Golo Kante, Reece James and Wesley Fofana.
Kalidou Koulibaly is also expected to miss the match, with Graham Potter saying before that game: ‘Koulibaly has an outside chance for Wednesday but not tomorrow,' reported Potter.
However, there was better news on Mateo Kovacic, who was withdrawn early during our midweek win against Red Bull Salzburg. ‘Mateo has no problem with his calf, it was more fatigue,' reported Potter.
Brighton are not expecting Jakub Moder to return until next year. However, they are hopeful that Adam Lallana and Joel Veltman will be available after going off injured in their last match.
Brighton vs Chelsea press conference
Potter used his customary pre-match media briefing to offer his support to Raheem Sterling, who is without a Premier League goal since August despite netting three in his first five for the club.
‘No you shouldn’t be concerned,’ Potter replied when pressed on Sterling’s form heading into the World Cup.
‘His quality speaks for itself. Sometimes the team doesn’t function as well and the team suffers. It is better to think about how we can attack better and create more chances,’ he added.
Brighton vs Chelsea commentary
Live commentary during the game in our Brighton vs Chelsea match centre