Brendan Rodgers gave his first-team a good run-out in their first game in six weeks, and goals from Youri Tielemans, Ayoze Perez and Jamie Vardy ensured safe passage into the quarter finals, while Dons are left to focus on the league after exiting their cup competition of the season.
Here’s how we rated the players in the game.
. MK Dons v Leicester City JAR_9526.JPG
Conor Grant battles with Harvey Barnes during the defeat to Leicester City Photo: Jane Russell
. Jamie Cumming - 6
Beaten by some quality goals from a top-flight strike-force. Did well to deny Vardy's initial effort which tell kindly to Tielemans to open the scoring. Comfortable in possession as always Photo: Jane Russell
. Jack Tucker - 6
Decent enough in the first-half, but was unwell and withdrawn at the interval Photo: Jane Russell
. Warren O'Hora - 6.5
A tough night for the defence, O'Hora led the side well Photo: Jane Russell
. Top Don: Zak Jules - 7
A decent defensive performance, made some good blocks and had a couple of roaming runs which gave the home fans something to cheer Photo: BEN STANSALL
. Daniel Harvie - 6.5
Felt he should have won a free-kick from this foul when he snuck in front of Wout Faes. Got doubled up on for the third goal. Photo: Mark Thompson
. Tennai Watson - 6
Blasted Dons' best chance of the game over the top in the first-half. Shifted in to centre-back for the second-half before being withdrawn to wrap him up Photo: Jane Russell
13. Sub: Matt Smith - 6
Struggled to get into the game as Leicester cruised through the second-half, but did cause issues with one driving run Photo: Jane Russell
14. Sub: Nathan Holland
Didn't enjoy much more joy than the rest of the frontline Photo: Jane Russell
15. Sub: Louie Barry - 5.5
Had a couple of decent moments on the ball, but they were rare for Dons attackers Photo: Jane Russell
16. Sub: Matt Dennis - 5.5
Got involved in the mix. Got on the end of a good Devoy ball and looked to play across goal to Grigg to no avail Photo: Jane Russell