An issue Amorim has is that his bench is almost exclusively made up of players with no Premier League experience. He will surely be hoping his established first-teamers can find a leveller before he has to turn to his replacements.
Or will he hook players at the break? He has already shown he isn’t afraid to be ruthless when he deems it necessary.
Spurs have looked the better side so far and deserve to be ahead, but it could have been very different. United had the chances to be level or even ahead themselves.
Garnacho then had a gilt-edged chance unopposed from eight yards out in the 23rd minute and blazed it over the bar. The winger looked rushed and snatched at it.
No wonder Amorim has been tearing his hair out on the touchline, he has seen this story play out before.
The referee brings the first half to an end. Spurs take a deserved 1-0 lead in at the break thanks to Maddison’s opportunistic strike but it is still all to play for.
The latest gives Spurs a free-kick from the left. Son whips it in but it is well dealt with by the United defence.
There will be one minute of added time.
Casemiro lifts the ball into the box and it causes trouble for the Spurs defence. Hojlund might have a half chance if he can get his head on it but he mistimes his jump and misses the ball completely.
Spurs look to break but a Casemiro foul halts that in its tracks and he earns a yellow.
Gary Neville has been scathing in his assessment of United so far, comparing the structure – or lack of – to an Under-10s team.
It has appeared easy for Spurs to play through midfield and launch an attack, but United have had their fair share of chances themselves.
Fernandes floats a free-kick into the box but the linesman’s flag is up for offside against De Ligt. Amorim continues to cut a frustrated figure.
Kulusevski finds Bentancur on the right flank but his cross is knocked out for a corner by De Ligt.
Bergvall has a shot from the corner but he is penalised by the referee for a push.
Spurs definitely seem the more likely to get the next goal.
Casemiro steals possession in the middle of the park and United break. Zirkzee finds Fernandes but his cross is wayward.
Spurs now look to spring a counter through Bentancur but it comes to nothing.
As well as the goal, Maddison has looked a constant threat for the hosts. Postecoglou must be delighted to have the playmaker back available.
Spurs come again. The ball is played into Son on the left and the South Korean cuts it back for Tel, who is making his Premier League debut.
The Frenchman strikes his shot well but Onana is gets down to make the save and concede a corner.
Amorim was not happy on the touchline after the Garnacho miss and it’s little wonder why. For all his side have struggled, they have failed to make the most of the chances they have created.
Zirkzee holds the ball up well and works some space away from Bergvall but fires his shot just wide.
Moments later, Garnacho has just Vicario to beat from close range but skies his effort well over the bar. What a chance and what a miss.
Some nice play on the edge of the United area opens up space for Kulusevski to have a shot but it is well blocked by Maguire.
The trend of conceding first continues for Man Utd. The question now is: how will they respond?
Dorgu makes a nice run up the left before feeding Garnacho. The Argentine teases to shoot before laying it off to Fernandes, but that delay allows the Spurs defence to get organised.
It’s end-to-end stuff. Son’s initial shot is blocked by Mazraoui but it falls to Bergvall, who forces Onana into a save.
The United shot-stopper can only parry it out and Maddison reacts quickest to nudge the ball home and give the hosts a 1-0 lead.
Son nearly latches onto a long ball over the top, but it’s overhit and Onana is able to gather comfortably.
Up the other end, Hojlund cuts in and lashes a shot that is well saved by Vicario. The ball then falls to Garnacho, who curls one towards the far corner.
Vicario saves again and that rebound is gathered by Dalot, but his shot from a tight angle is cleared to safety.
Spence then charges down the left flank and does the same. The hosts have definitely settled quicker and are causing some problems on that wing.
After the big build-up, it’s been a sluggish start. Neither side has really ventured forward.
Spurs have already beaten United twice this season: once in the reverse fixture at Old Trafford and 4-3 in the quarter-final of the Carabao Cup in December. They will be gunning to complete the rare three-peat.