Dundee showed signs of a derby day hangover as they followed up Monday’s famous win with a hapless showing against Hamilton.
Carlton Morris’ first-half strike was the difference between the sides as the Dark Blues hopes of making seventh their own and remaining unbeaten post-split went up in smoke.
The Accies frontman’s goal was a shambles for Dundee defensively.
A simple ball through the backline allowed Morris the chance to roll Kosta Gadzhalov and hammer past Scott Bain into the bottom right hand corner.
Nick Ross had the chance to level soon after, following some neat interplay between Julen Etxabeguren and Kane Hemmings, but his effort from six yards was wide.
Accies had the ball in the net for a second time after the hour, courtest of Eamonn Brophy, but it was chalked off for offside in bizarre circumstances. With Dundee ready to kick-off, referee Steven McLean decided to consult his linesman and went back on his original decision to award the goal, despite the fact his linesman had not flagged initially.
But Morris’ goal proved to the difference as the home side failed to capitalise on the feel-good factor of Monday’s victory.