Pascal Chimbonda struck late to grab all three points for our reserves at West Brom on Monday night.
The defender powered home a header from Ryan Mason's corner three minutes into four minutes of added time at The Hawthorns.
It was no less than the lads deserved after recovering from going a goal down in a scrappy, feisty first half to take the game to the Baggies after the break.
Clive Allen made a number of changes to the side that beat Chelsea 4-0 last week, most notably the return to action of Alan Hutton at right-back.
Out for four months with a foot injury, the Scottish international was full of running in a 70-minute stint and came through unscathed.
A chill wind swirling around the stadium didn't help matters as both teams struggled to maintain possession and create anything in the final third of the pitch.
The play was punctured by number of heavy challenges - Danny Rose on the receiving end of two - and a yellow cards dished out to both sides by referee Dean Mohareb.
Ben Alnwick saved early with his feet from Juan Menseguez but it wasn't until the 38th minute that either keeper was tested again.
In-between, Gilberto curled a free-kick just wide and Michael Dawson looked set to tap in Rose's cross until Dwayne Samuels intervened.
Alnwick's second save denied Roman Bednar diving to his right, but ultimately it led to the opening goal. West Brom's corner was cleared out to Filipe Teixeira, whose shot was on its way to the corner flag but found Ryan Donk, still up for the set-piece, and the defender did well to angle a cushioned volley back over Alnwick and into the far corner.
Ryan Mason came on for the injured Dean Parrett at half-time and went up front with Paul-Jose M'poku wide right and Gilberto pushed forward on the left, Rose encouraged to push on centrally from midfield at every opportunity.
We made a bright start and were rewarded five minutes into the half with the equaliser.
A lot of the credit has to go to M'poku, who was too strong for Samuels down the right and cut the ball back for Gilberto to strike first-time past Ryan Allsop from 20 yards.
There was almost a repeat five minutes later when M'poku did well again down the right and teased in a cross that Mason met with a diving header just wide.
It was still stop-start but we had more control in our play and bossed possession, the Baggies not too much of a threat.
The next chance fell to Mason, who angled his run to get away from Jared Hodgkiss and was picked out by Jacques Maghoma's pass. Donk covered quickly to close Mason down and his shot didn't trouble Allsop.
Substitute Romaine Sawyers rifled a rare effort from the home side over after 76 minutes but play was soon down the other end as Gilberto hit a dipper just over from distance.
It was all Spurs now as we tried to carve out that one clear-cut chance - but it fell to West Brom in added time. It was a treble chance as well as Alnwick denied Luke Moore, Ricardo Rocha threw himself in to block the follow up from Chris Wood before Sawyers fired wide of an empty net.
That looked to be that as we were well into added time but there was still time to win a corner, Mason curled in and Chimbonda got between defenders to head home the winner.
West Brom: Allsop, Hodgkiss, Samuels, Kim Do-Heon, Donk, Hoefkens, Menseguez (Wood, 62), Teixeira (Mantom, 67), Bednar (Sawyers, 62), Moore, Knight. Unused subs: Downing, Lovell.
Spurs: Alnwick, Hutton (Smith, 71), Chimbonda, Livermore, Dawson, Rocha, Maghoma, Parrett (Mason, 46), M'poku, Rose (Butcher, 85), Gilberto. Unused subs: Ranieiri, Berchiche.