The Foxes started their Group G campaign with a convincing win against Zorya Luhansk, while their next opponents succumbed tamely away at Braga.
With several members of his squad sustaining injuries and surprise home defeats coming against West Ham United and Aston Villa, the start of the season has not been as smooth as Brendan Rodgers would have hoped.
However, back-to-back wins over Zorya and Arsenal without conceding a goal has lifted the mood at Leicester, who now sit in fourth position in the Premier League table.
Rodgers will prioritise their progress in England's top flight over the Europa League, but that will not stop the Northern Irishman demanding another professional performance later this week.
While the 23-year-old has been kept in reserve for now, the Roma loanee could emerge as a key player as the season progresses with Rodgers needing to manage the fitness of his squad.
Despite only claiming third place in the Greek Superliga in the past two seasons, AEK Athens would have been optimistic about having a prolonged run in this competition when they discovered their opponents for the group stages.
Losing heavily to Braga may have changed their belief, however, and head coach Massimo Carrera will acknowledge that the club can ill-afford another defeat at this stage.
Nevertheless, AEK have been poor of late, with their only victory in four matches coming by a 1-0 scoreline at PAS Giannina on Sunday.
Carrera will understandably be concerned about the development of his side since their famous win over Wolfsburg in the final qualifying round, but that result is a reminder that they have the quality to compete with higher-class opponents on their day.
AEK Athens Europa League form: WWL
AEK Athens form (all competitions): WWLDLW
Leicester City Europa League form: W
Leicester City form (all competitions): LWLLWW
While Vardy has been included in the travelling group, Leicester boss Rodgers may keep his star man in reserve.
Former Swansea City and Norwich forward Nelson Oliveira is pushing for a start in attack.
AEK Athens possible starting lineup:
Tsintotas; Paulinho, Chygrynskiy, Svarnas, Lopes; Mantalos, Shakhov, Krsticic; Tankovic, Ansarifard, Livaja
Leicester City possible starting lineup:
Schmeichel; Justin, Fofana, Morgan, Fuchs; Choudhury, Praet; Under, Perez, Albrighton; Iheanacho
We say: AEK Athens 1-2 Leicester City
With Rodgers expected to rotate a number of his senior players, a closely-fought contest could be played out in Greece. However, victory in this contest would put Leicester well on the way to qualification, and we expect a professional performance from the English side.