Barnet manager Paul Fairclough admitted the 2-1 defeat at Southend makes this weekend's home clash against Lincoln a pivotal game as his side look to drag themselves away from the relegation zone.
Early Shrimpers goals from Craig Easton and Ryan Hall meant Steve Kabba`s late header for the Bees was a mere consolation
Fairclough, whose side are bottom of the table and two points from safety, said: "Our season hinges on Saturday's game and it has become a must-win one for us.
"There is nothing wrong with the spirit in the side, we have shown that here, and I can guide them, but the players must do it on Saturday.
"It's tough at the moment and we have to start making our own bit of luck. We have hit a post before half-time and hit the crossbar at the end and if the ball had gone in it would have given us a great lift.
"Credit to my players for the way they played for an hour-and-a-quarter, but the game hinged on the first 15 minutes and credit to Southend for the way they came out and attacked us early doors."