Ryan Flynn says the players are upbeat about their chances overcoming Swindon Town in the semi-finals of the Sky Bet League One play-offs, despite losing the first-leg at Bramall Lane.
Reflecting on Thursday's cruel loss to the Robins, the Scotsman said: "It was a bitter pill to swallow to lose the game so late, having created a number of chances in the first-half, but that's gone now.
"We caused Swindon an awful lot of problems defensively and if we can assert ourselves early on down there then we should still be optimistic about our chances.
"We are under no illusions though how difficult it will be, they have a goal advantage and are at home in front of their own supporters, but it is effectively a cup tie now and that has often suited us in recent months."
With that in mind, United's number seven insists it is still all to play for at the County Ground and insists reaching the final at Wembley on 24th May is an achievable target.
He added: "Swindon must decide whether to look to try and build on their lead or hold on to what they have got.
"On the other hand we know we have to go there and win on the night to have a chance. The first goal will be crucial either way, but if we score first then suddenly the tie is back in the balance so that has to be our first aim.
"We are the underdogs without doubt now, but that hasn't bothered us in the past and won't on Monday, we remain focused and determined to succeed."