The Foxes made ten changes going into a match they desperately needed to win to gain some much needed confidence. Thankfully, Derby put out a second string team of their own, which made for a dismal first half. Leicester had a decent chance to go ahead in the 33rd minute, as Demari Gray put a sensational ball across goal. All it needed was a touch and it would've been 1-0 to Leicester, but unfortunately Ahmed Musa could get nothing on it.
Any other attacking efforts looked speculative at best, with the Foxes registering zero shots on target in the half. And despite a couple shaky moments, the defensive held up quite well, giving both teams all to play for as they went into the break.
Leicester certainly started the brighter of the two sides in the second half, bagging a goal in just over a minute. Gray played an excellent cross into Marc Albrighton at the far post, who headed it back to an unmarked Andy King for an easy header into the back of the net to make it 1-0.
The goal definitely injected some confidence into the team, only for Derby to get back into it against the run of play in the 61st minute.
A high foot from Albrighton gave Derby a free kick in a dangerous position near the edge of the area. Abdoul Camara's low effort took a wicked deflection off the outstretched foot of Ben Chilwell and into the back of the net to level the scoring at 1.
From there things began to slow down, but not without controversy. Chilwell played an excellent ball up towards Musa, who beat Derby goalkeeper Jonathan Mitchell to the ball outside the area. Mitchell hands were clearly outstretched, and Musa's touch definitely struck his hand. Although it wasn't necessarily intentional, the ball clearly struck Mitchell in the hand outside of his area. Lucky for him it was on the wrong side of the referee, much to the dismay of the Leicester faithful.
The match needed extra-time to decide, and Leicester regained the lead within a couple minutes thanks to a spectacular 25-yard strike from Wilfred Ndidi.
After a missed sitter from Islam Slimani and a couple half chances, Leicester finally grabbed their third through Demari Gray.
Andy King put in an excellent tackle to win possession near midfield, sliding it out to Gray on the left hand side. The winger managed to play his way through three defenders before hammering into the back of the net to cap off an excellent performance.
The victory means that not only do the Foxes have a trip to Millwall in the Fifth Round in 2 weeks time, but also some much needed confidence heading into a crucial 6-pointer against Swansea this coming Sunday.