AFC Wimbledon came from a goal down to beat Southend.
Shrimpers skipper Sean Clohessy put the home side in front from the penalty spot after Pim Balkestein handled Kevan Hurst's corner.
Balkestein made amends three minutes later by heading in a corner before former Southend loanee Jack Midson nodded home at the near post.
Substitute Luke Moore sealed three points for the Dons, scoring with his first touch from 20 yards out.
VIEW FROM THE DRESSING ROOM
Southend United manager Paul Sturrock told BBC Essex:
"I'm in disbelief. Saturday
[Southend won 2-1 at promotion-chasing Port Vale]
we had a great performance. I stuck with certain players, picked the same team with the same tactics and it's like watching different people play.
"We looked lethargic, sloppy - we weren't up for the fight. We got exactly what we deserved.
"We've had two or three of these types of the games. It seems to be the mental approach to the game. We seem to saunter along at times.
"We don't grab the game by the throat."
Southend United 01 Smith 02 Clohessy 03 Straker (Spicer - 71' ) 04 Spillane (Corr - 64' ) 06 Cresswell 16 Prosser Booked 18 Leonard (Harris - 46' ) 28 Bilel 12 Lund 14 Hurst 20 Assombalonga Substitutes 17 Bentley 19 Spicer 30 Woodyard 07 Eastwood 09 Harris 10 Corr AFC Wimbledon 22 Sullivan 05 Balkestein (Midson - 45' ) 06 Mitchell-King 25 Youga Booked 31 Meades Booked 39 Bennett 08 S Moore Booked 12 Pell 16 Sainte-Luce (Darco - 67' ) 09 Dickenson (L Moore - 67' ) 28 Alexander Substitutes 33 Jaimez-Ruiz 03 Cummings 07 Long 23 Yussuff 10 Midson 11 L Moore 14 Darco