Charlton Athletic have missed the chance to extend the gap between themselves and the rest after falling to a 1-0 defeat against AFC Wimbledon.
Striker Lyle Taylor took advantage of a slip by Patrick Bauer to slot it home past Ben Amos in added time of the first-half.
The Addicks remain in the play-off places in sixth, with five games remaining, while the Dons secure their second win in eight games in their battle against the drop.
Aside from free-kicks by Sully Kaikai and Jake Forster-Caskey, the Addicks had limited clear-cut attempts to test goalkeeper George Long in the first-half.
Defender Jason Pearce got a knock-down header to Stephy Mavididi with a half-chance presenting itself, shortly before the end of the half, but it was eventually cleared away in what was perhaps the Charlton’s closest opportunity at goal during the first 45 minutes.
But when Wimbledon broke, they broke with conviction - midfielder Liam Trotter had a couple volleys which dipped just over the bar after falling inside his shooting range, while Harry Forrester often combined with full-back Jon Meades to put Ezri Konsa under duress.
Perhaps the best chance for Neal Ardley’s men came around 30 minutes in when former Charlton striker Joe Pigott got free of his marker and had a crack at goal in open space, but a diving save by Ben Amos kept the ball out of the net.
Striker Taylor proved to be a handful as well, taking Patrick Bauer out of the equation after a goal-kick only to be denied when Pearce scrambled back to intercept the onrushing ball and thus clearing away the danger.
However, he would get his redemption when he pounced on a slip by Bauer to race through on goal and slot it past Ben Amos for 1-0 in added time of the first-half.
This is the first time Lee Bowyer’s side has trailed at half-time since he took over from Karl Robinson last month and their first defeat under his reign.
Chances for Charlton were still few and far between after the restart, with a Kaikai free-kick coming closer to the net than the previous attempt.
It could have been 2-0 but a last-ditch tackle by Lewis Page denied Pigott a goal against his former club after he was put through by Dean Parrett.
Charlton struggled to regain a foothold in the game as the Dons continued to gain confidence, but it could have been level when a Pearce header was nodded onto the post by a Wimbledon player and bounced out on 72 minutes.
Both Mark Marshall and Josh Magennis were introduced with 20 minutes of normal time remaining but much of the match remained the same, with former Milton Keynes Dons man Ben Reeves not being the most popular player when he walked off the pitch.
By the final 10 minutes it was advantage Wimbledon as the south London clash drew to a close and Charlton unable to find channels past a resilient Dons rearguard.
Charlton XI: Amos, Konsa, Bauer, Pearce, Page, Reeves (Marshall, 70), Forster-Caskey, Aribo, Kaikai (Ajose, 80), Mavididi (Magennis, 55), Zyro.
Subs not used: Phillips, Dijksteel, Lennon, Dasilva.
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