Boss rues key chances missed at crucial times in the game against the Spireites.
Southend United boss Phil Brown was left 'saddened' for the Blues supporters as his side were brushed aside by a ruthless Chesterfield.
Sylvan Ebanks-Blake grabbed a brace after Lee Novak had given the Spireites an early lead.
But Brown felt things could have been different had Blues taken the chances just before and just after half time.
“We didn't roll our sleeves up tonight and it was an uncharacteristic performance,” the boss reflected.
“The basics were very poor tonight. We played some lovely stuff early on but then they scored. We had some hard words at the break and we had two good chances after half time.
“I think the key time was just before half time when we had a great chance. We were weak tonight but we need to iron things out.
“We conceded a goal from a set piece which is unlike us but that sums up the evening for us.”
But following an impressive unbeaten run, Brown is backing his side to put in a performance in the local clash at Gillingham on Saturday at Priestfield Stadium.
“I can guarantee the 200-300 supporters will have something to cheer on Saturday at Gillingham.
“They go home empty handed and sad, which, as a manager, saddens me when the team doesn't perform after they've travelled all this way.”