An early Scott Laird penalty was enough to see Stevenage beat 10-man Hartlepool in an all League One FA Cup tie.
Pools keeper Scott Flinders saw red after he fouled Chris Beardsley in the area, Laird confidently scoring the resultant spot-kick.
Substitute keeper Andy Rafferty saved well from Robin Shroot and Craig Reid as Boro pressed on.
Andy Monkhouse almost grabbed a replay but his lob clipped the crossbar with visiting keeper Chris Day beaten.
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Stevenage manager Graham Westley told BBC Three Counties Radio:
"We have had to rely on our defensive work to keep the sheet clean. We weren't productive enough with our possession against their 10 men. In the end we have done enough with that penalty to win the game.
"We developed really good play in the first half and really should have made something from it and made progress into the next round more comfortable than it was. It wasn't until the second half that they caused problems.
"Today, they were there to be taken and we didn't do enough damage. We are certainly not getting carried away with ourselves, we know there is a lot of work to do. We have had an off day today and won ugly, which is a positive."