Neil Harris has suggested that his Millwall team were "a shambles" after their 4-0 home defeat to Coventry City this afternoon.
A double from Adam Armstrong, as well as goals from Ruben Lameiras and Jim O'Brien, gave the Sky Blues a comfortable win.
Speaking to club reporters after the game, Harris said: "We were a shambles to be honest.
"We didn't react to going behind and that is extremely disappointing. This hurts.
"It's clear that some of the players struggle to play here at the moment. That will show in my selection for Tuesday."
Millwall will face Barnsley at The Den on Tuesday evening.