The Bucks head to National League North high-fliers Chester tomorrow with boss Cowan stressing that a similar performance will result in ‘a lot worse’ for his players.
Cowan, whose side sit 17th, said Telford must show the desire at the Deva Stadium that was desperately lacking in the home 5-0 demolition by Leamington.
“We need a reaction,” Cowan said. “If we don’t get a reaction from the players then we’re going to get a lot worse than we got on Tuesday from Chester.
“It will be interesting to see how they react on Saturday.
“I was somewhat speechless. It’s difficult to articulate your thoughts when you’re so disappointed. Everyone’s hurting.
“Worse than that (lacking heart) I think we weren’t good enough. We lacked desire.
“We worked hard but there’s a difference between working hard and showing desire.
“We’ll just get the same again if we don’t show enough desire. We’ve got to train well, get it out of us and go from there.”
Telford’s inconsistency this season has them nine points off the top seven, which would be good enough for a play-off spot.
Cowan added: “I wouldn’t put it past us to put in a performance and get a result with the way that we’ve been in terms of our form, I wouldn’t put it past us.”