Birmingham City boss Lee Clark was disappointed not to leave St Andrew's with three points following a 1-1 draw with Blackpool.
The Blues looked set for victory until Kirk Broadfoot cancelled out Curtis Davies' opener, and Clark's men were denied an opportunity in the 87th minute when substitute Wade Elliott blazed over from six yards with the goal at his mercy.
A disappointed Clark said: "It was definitely (two points dropped), I think we deserved to win the game.
"It was a nervy start for the first 15-20 minutes but we grew into the game and finished the half really strong, we could have been more than one-nil up.
"And then we started the second half really well too, unfortunately we couldn't get that decisive second goal and then they score a very similar goal to us from a set-play.
"It's a bit frustrating really. We've played with a lot of desire, tenacity and at a high tempo."
Regarding Elliott's miss, Clark added: "I haven't seen a replay yet but one of the coaches has and it looks like it's bobbled up a bit."
Boro came into Tuesday night's League One match at Broadhall Way in dismal form, but earned a deserved victory when Haber stole in behind the Bees' defence following a long header upfield from skipper Mark Roberts.
The hosts started the brighter and almost went ahead in the fifth minute when former Brentford midfielder Gavin Mahon headed against the post.
It was then Haber's turn to strike the woodwork, heading Greg Tansey's corner against the crossbar, while he was again denied after 35 minutes when visiting goalkeeper Simon Moore kept out his close-range effort.
Uwe Rosler's side came flying out of the blocks after the break and almost levelled when Clayton Donaldson found himself one-on-one before Haber's opportunist goal broke the deadlock.
Bradley Wright-Phillips saw a good chance to level saved before Sam Hoskins warmed Moore's palms late on at the other end as Stevenage held on for the win.
Brentford missed out on the chance to move into the top three after suffering a first league defeat in six matches.
