The Sky Blues exited the Carabao Cup in the first round after falling to defeat against AFC Wimbledon.
Wimbledon came the closest to opening the scoring, a ball across the box fell to James Tilley, but he fired wide from close range.
Haji Wright started for the first time in Sky Blue and he had his first sniff of goal six minutes in, linking up well with Matty Godden, before forcing Nik Tzanev into a good stop.
Godden came into the game fresh off signing his new deal and he almost had a goal to celebrate it with, but he was denied from just inside of the area by the outstretched arm of Tzanev.
However, Godden would get his chance to score his first of the season after Wright was brought down in the area by Joe Lewis and the referee pointed to the spot.
Godden stepped-up to take the penalty and found the bottom right corner and fired the Sky Blues in front inside the opening 20 minutes.
Gustavo Hamer had a sight of goal ten minutes later, drilling the ball low towards goal, only to be denied by a fine stop.
City ended the half with a flurry of chances, Ryan Howley had a shot blocked on the line, Bidwell saw two of his efforts stopped by Dons defenders and then finally Liam Kelly bent the ball inches wide from the edge of the area.
HALF-TIME: AFC Wimbledon 0-1 Sky Blues
Following the restart, City almost doubled their lead through Bidwell at the back post, but his effort was stopped by Tzanev.
Wright was looking for his first goal for the Club and he thought he had it when he brought the ball under control with his chest then turned and smashed a volley towards goal, only for it to sail over the bar.
Before being withdrawn for Ben Sheaf in the 55th minute, Hamer struck a powerful effort narrowly wide of goal.
Wright came close again fifteen minutes from time, losing his marker to get on the end of van Ewijk’s cross into the box, but he couldn’t steer his header on target.
The Sky Blues were knocking on the door and two substitutes combined, with Palmer forcing Tzanev into a save from range and then from the rebound, the ‘keeper kept out Ellis Simms.
In the 87th minute, Wimbledon would find a leveller with their first shot of the second half and it was Omar Bugiel who struck the ball into the bottom corner from outside of the area.
Then in the second minute of injury time, Wimbledon won it with a Ryan McLean volley at the back post.
FULL-TIME: AFC Wimbledon 2-1 Sky Blues
Goals: Matty Godden, Omar Bugiel, Ryan McLean
Yellows: Joe Lewis, James Tilley, James Ball
Attendance: 4,781 (1,189 away)
Sky Blues Xl: Brad Collins (GK), Ryan Howley (68’ Palmer), Joel Latibeaudiere, Luis Binks; Milan van Ewijk (92’ Eccles), Liam Kelly (C), Gustavo Hamer (55’ Sheaf), Jake Bidwell; Tatsuhiro Sakamoto, Haji Wright, Matty Godden (68’ Simms).
Subs: Simon Moore (GK), Callum Perry, Jay Dasilva, Evan Eghosa, Josh Eccles, Ben Sheaf, Ellis Simms, Kasey Palmer, Justin Obikwu.
AFC Wimbledon Xl: Nik Tzanev (GK), Isaac Ogundere, Joe Lewis, Ryan Johnson, Lee Brown, James Ball (79’ Bugiel), Jake Reeves (C), Aron Sasu (64’ Davison), James Tilley (83’ McLean), Harry Pell (79’ Little), Ali Al-Hamadi (64’ Neufville).
Subs: Alex Bass (GK), Josh Davison, Josh Neufville, Armani Little, Alex Pearce, Ryan McLean, Omar Bugiel, Ethan Sutcliffe, Morgan Williams.