Pedro Porro and Rodrigo Bentancur combined on the right with the latter able to pick out Son Heung-min
Who volleyed into the path of Lucas Bergvall.
While Andre Onana saved the initial effort, Maddison was on hand to fire home the rebound.
Amorim’s depleted United did respond with Joshua Kirkzee off targe. Before Garnacho blazed over a golden chance from Bruno Fernandes’ neat through ball.
It was almost immediately punished when Son cut back for Mathys Tel but Onana produced a fine low save.
United threatened again before the break but failed to make the most of a free kick in a dangerous position as it remained 1-0 at half-time.
Tottenham started the second เล่น UFABET ผ่านมือถือ สะดวกทุกที่ ทุกเวลา period strongly. With Tel denied by Onana before another brilliant run by Djed Spence set up another chance for Bayern Munich loanee Tel but he fired wide.
It was then over to United as Zirkzee superbly played through Garnacho only for Vicario to rush out smartly to block.
The same duo went head-to-head again in the 58th minute as Vicario got down to make an outstanding stop to thwart Garnacho’s first-time effort. After Spurs failed to deal with a cross into the area.
It was end-to-end now as Tel had another shot deflected wide before Postecoglou introduced Pape Sarr and Brennan Johnson with 26 minutes left.
After Noussair Mazraoui diverted another Son effort behind for a corner, United should have levelled when Mazraoui picked out Zirkzee. He put his header inches past the post in the 72nd minute.
As Tottenham made two more substitutions, Amorim continued to ignore his bench. Which was filled almost entirely with teenagers such is the threadbare nature of his struggling squad.
Yet chances continued as Onana thwarted Dejan Kulusevski before Spence blocked from Hojlund.
United created one final opportunity but Casemiro headed straight at Vicario as Spurs held on for a vital victory.