Yeovil Town manager Terry Skiverton called his players into a late-night meeting after Tuesday's FA Cup defeat by non-league Fleetwood.
After drawing the initial second round tie 2-2, the Blue Square Bet Premier side eliminated the Glovers with a deserved 2-0 replay win at Huish Park.
Straight after the game, Skiverton told BBC Somerset: "We're going to go over it now.
"I've got a meeting booked in with them to put a few things right."
He added: "I can't let this sit on my chest tonight."
After struggling early on in the season, League One Yeovil had turned their form around in recent weeks and climbed out of the relegation zone.
But they were well beaten by Micky Mellon's Fleetwood side and Skiverton admitted: "The occasion for the better of us.
"Credit to them, they deserved it. They could have had two or three more. The emotions are running quite high now because I love the FA Cup so much.
"Off the back of a very good win to get us out of the bottom four [against Notts County], we've turned up and played like a team who's looking to get relegated. That's just not acceptable.
"We've given the supporters so much joy on Saturday and then we've let them down tonight. This is going to be one of the lows in my management career.
"In front of the TV cameras, we didn't do ourselves justice tonight."