Though Chelsea will undoubtedly want to progress as far as possible in the League Cup, today's match will most likely be used to rest some of the club's key players in preparation for more important matches, such as Saturday's Premier League match against Manchester City.
And, with such a large roster, Chelsea should be able to rotate without losing too much quality.
The newcomers, on the other hand, will be eager to impress Tuchel in order to earn more regular playing time in the future.
Here are five players who should be looking to do so.
Ben Chilwell is the first and most obvious player who should be eager to impress Tuchel against Villa.
The left-back was a vital player for the Londoners at the end of last season, and he was instrumental in their Champions League triumph.
This season, however, he has fallen out of favor and has played just seven minutes, with Marcos Alonso taking his place as Chelsea's first choice left-winger.
2. Timo Werner
Following the arrival of Romelu Lukaku, it was assumed that at least one Chelsea attacker's playing time would be drastically cut to make room for the Belgian.
So far, Timo Werner has been that player. The German made his Premier League debut on the opening weekend, but has only played 29 minutes in four games since then.
He came off the bench against Tottenham at the weekend, but he squandered a good chance, which he will no doubt be looking to rectify against Villa.
3. Callum Hudson-Odoi
Callum Hudson-Odoi is a Chelsea periphery player at the moment.
He is behind Reece James and Cesar Azpilicueta at right-wing-back. In the offensive line, Kai Havertz, Mason Mount, Christian Pulisic, and Hakim Ziyech are frequently preferred above him.
As a result, CHO will be anxious to put on a strong performance against Villa if given the chance.
4. Kepa Arrizabalaga
Over the weekend, Kepa Arrizabalaga filled in for the injured Edouard Mendy and maintained a clean sheet against Tottenham.
And, with the African certain to miss the game against Villa, Kepa will be looking to put in another strong performance to increase his chances of dethroning Mendy as Chelsea's first choice.
5. Saul Niguez
Saul Niguez's Chelsea debut was a disaster, as he was sent off after 45 minutes against Aston Villa.
As a result, after being benched against Tottenham on Sunday, the Spaniard should be eager to make amends this week against Villa.
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