Scott Laird's late strike saw Stevenage extend their excellent run of form with a victory over Sheffield United.
Stevenage took the lead when Craig Reid's corner was not cleared by the Blades' defence and Mark Roberts drilled a shot past Steve Simonsen.
Blades substitute Ched Evans struck a low free-kick into the corner to level the scores.
But Boro claimed the victory when Lawrie Wilson was fouled and Laird fired home the resulting penalty.
VIEWS FROM THE DRESSING ROOM
Stevenage manager Graham Westley told BBC Three Counties Radio:
"It was a solid performance. It was professional, it was organised. There was a great discipline about it, great work rate, everything that is us really.
"It was a cup final from our point of view in his (Danny Wilson's) words. I have got news, every game is a cup final to us. I think if you are going to win honours you have got to treat every game as a cup-final.
"Look at the chances in the game - we have hit the crossbar, we've rattled the ball across the goal, we had numerous attempts on their goal during the 90 minutes. Cresswell fired over and the free-kick is about all they have mustered."
Sheffield United boss Danny Wilson told BBC Radio Sheffield:
"I think we weathered a very long aerial bombardment, as we expected, physicality with players falling down, free kicks coming in the box, long throws coming in and we dealt with it.
"When we got back into the game there was only one team going to win it in my mind.
"The spaces were opening up for us and we started to play and stretch them and then it's an indecision again."