Town were comfortably beaten by Leicester at the King Power Stadium, going down 6-0 to the Foxes.
A brace from David Nugent set Nigel Pearson’s side on the way with further strikes from Lloyd Dyer, Anthony Knockaert, Martyn Waghorn and Marko Futacs.
Mick McCarthy made two changes to the Town line-up, with Bradley Orr making his debut in defence in place of Tommy Smith, whilst Lee Martin returned from suspension to take his place on the bench.
Blues struggled to get a foothold on the game early on and some slack defending saw Danny Higginbotham and Stephen Henderson get into a mix-up, with Lloyd Dyer nipping the ball away before being brought down by the Town stopper to see Leicester awarded a penalty kick after nine minutes.
Nugent duly converted the spot-kick to fire the hosts in front, with Henderson diving the wrong way.
Town did go close to troubling the Leicester goal five minutes later, but Guirane N’Daw’s header from a Martin corner looped over the crossbar.
Things got worse for Town after 17 minutes as Nugent grabbed his and the Foxes’ second of the afternoon.
Henderson could only palm a Waghorn shot into the path of Nugent and the striker couldn’t miss from a yard out as he doubled Leicester’s advantage.
A surging run from Martin did offer some hope for Blues but his shot was well charged down by City captain Wes Morgan.
But Town ‘keeper Henderson was soon picking the ball out of his net again after 28 minutes. An impressive run and finish from Dyer saw his effort arrow into the bottom corner to make it 3-0.
Martin went close for Town late on in the first-half, but he could only fire wide from inside the area with Kasper Schmeichel rooted to his line.
Henderson had to be alert to keep out an effort from Knockaert shortly before the break but the midfielder was to beat the Town stopper a minute before half-time.
Dyer used his pace to get away from Orr and the winger squared the ball to an unmarked Knockaert to slam the ball home from close range to ensure the hosts went in at the break 4-0 up.
The second-half started in the same fashion as the first, with Waghorn unfortunate to see a goalbound header come crashing back off the post after 49 minutes.
But the former Sunderland striker was to get on the scoresheet four minutes later, curling a placed effort over the outstretched hand of Henderson and into the top corner to make it 5-0 to Nigel Pearson’s side.
With 20 minutes remaining, Blues did finally work Schmeichel into a save, with substitute Jay Emmanuel-Thomas taking an Orr cross on his chest before volleying at goal that the Leicester ‘keeper was more than a match for at his near post.
The scoreline was yet to get worse for Town though, as Futacs came off the bench to net Leicester’s sixth goal with 82 minutes played, sweeping home a Dyer pass into the bottom corner.
Town did come close to a consolation strike with three minutes remaining, but Michael Chopra could only head Emmanuel-Thomas’ cross over the bar.
That was the way it stayed as Town suffered a disappointing defeat at the King Power Stadium and will now focus their attention to Saturday’s home clash with Peterborough.