The Blues have been on a bit of a losing streak since then, falling to both Manchester United and Brighton in the Premier League as they undergo an injury crisis, particularly at the heart of defence.
First-choice centre-backs Tosin Adarabioyo and Wesley Fofana were both ruled out of the home defeat by the Seagulls last weekend, with deputy left-back Jorrel Hato filling in alongside Trevoh Chalobah, who was shown a red card.
Levi Colwill injured his anterior cruciate ligament is out for the remainder of the campaign, while talisman Cole Palmer is still struggling with a groin injury.
Dario Essugo and Liam Delap are other longer-term absentees.
How to watch Chelsea vs Benfica
TV channel: In the UK, the game will be televised live on TNT Sports. Coverage starts at 7pm BST on TNT Sports 1 and TNT Sports Ultimate ahead of the 8pm kick-off.
Live stream: TNT Sports subscribers can also catch the contest live online via the Discovery+ app and website.
Live blog: You can follow all the action with Standard Sport’s live blog!
