Chelsea, meanwhile, head into the last eight after surviving a second-half fightback and with the added boost of an impressive start to life at Chelsea by Drinkwater.
Impressing on his senior debut in Everton's midfield, Beni Baningime spurred the Toffees into life after the restart with a crunching challenge on Ethan Ampadu - Jonjoe Kenny firing wide from the resulting counter.
The Stamford Bridge faithful are pretty happy with their starting XI.
A low shot from Willian, which flew in off the post, in stoppage-time doubled the advantage for Antonio Conte's team although Everton forward Dominic Calvert-Lewin swiftly responded with a good finish to give the Merseyside club a consolation.More news: Star Trek: Discovery Will Return for Season 2
However Courtois says that the players are behind Conte and if there was an issue, they would tell their Italian coach.
Chelsea do lack some depth in certain areas of their squad including the midfield/attacking midfield areas and Musonda, although buried down in the pecking order, does provide cover in a number of positions which is a positive for Antonio Conte.
Plenty of rotation will on the cards with the likes of Charly Musonda and Kenedy expected to get some game time for the Premier League champions.
"We knew James McCarthy could only play for 60 minutes so we were always going to change things then". The short socked one was better in the second half, but Unsy wasn't given much reason to not re-insert Idrissa Gueye on Sunday.