Ange Postecoglou acknowledged Tottenham had to hang in there to avoid a Carabao Cup upset at Coventry, but was pleased with their spirit and character after a nervy 2-1 victory.
Spurs were set to follow up Sunday's painful derby defeat to Arsenal with another loss after Brandon Thomas-Asante fired the Sky Bet Championship club into a deserved lead after 63 minutes.
It would have put Postecoglou's post-match comments last weekend about always winning silverware in his second season into sharp focus, but Djed Spence spared his blushes when he levelled with two minutes left.
Spot-kicks were still on the cards until Rodrigo Bentancur played through to Brennan Johnson, who chipped home in the 92nd minute to send Tottenham through and leave their travelling support singing about Wembley.
'We had to hang in there. We had to work really, really hard just to stay in the game and obviously going a goal behind makes it even more challenging,' Postecoglou said.
Postecoglou was delighted with his side's character after they came from behind to win
Brennan Johnson completed Tottenham's comeback with the winning goal in the 92nd minute
Coventry City were arguably the better team but failed to make their chances count
'At the end there, we showed some real spirit and character, which is probably what's been missing in the first four games.
'We've had the performance, but we haven't had that relentlessness to get a result. You sense that in the last 10 minutes, we got real belief out of that and hopefully that's a good sign moving forward.'
Postecoglou also put his hand up and conceded his side's lack of fluidity came down to making major changes to the starting line-up.
'Look, we weren't very fluent tonight or cohesive,' Postecoglou told Sky Sports.
'When you make a lot of changes, that's on me. We weren't as fluent, certainly performance-wise.
'Some of that is down to Coventry. I thought they were excellent tonight. They played with a real high energy and we had to hang in there for as long as we could.
'At the end I was really pleased for Djed and Brenna because they've come on and made a difference for us and made an impact in the game.'
It could end up being a pivotal victory for Postecoglou, but it was an overall poor night for a much-changed Spurs team.
Tottenham supporters were not happy with Postecoglou's decision to take off Lucas Bergvall
Coventry scored just seconds after Bergvall went off, sparking hopes of a major boilover
But Djed Spence sparked the comeback when he equalised for Tottenham in the 88th minute
Coventry almost scored inside 60 seconds but Fraser Forster atoned for a misplaced pass with a fine save to deny Jack Rudoni.
Tottenham dominated possession but failed to create chances and Rudoni had another effort blocked by Destiny Udogie before Norman Bassette fired over.
After no first half shot and a smattering of boos at the break, Postecoglou sent on Spence and Johnson did have a shot deflected wide but Forster had to deny Bassette before Coventry called for a penalty.
Jake Bidwell collided with Forster and as play continued Ben Davies had to slide in to thwart Haji Wright's goalbound effort.
Boos greeted Postecoglou's decision to take off the lively Lucas Bergvall in the 62nd minute before seconds later Thomas-Asante slotted home from a sumptuous Bassette cross.
Brennan Johnson (left) latched onto a pass from Rodrigo Bentancur to score the winning goal
Further chances were fashioned for the hosts as Ephron Mason-Clark failed to get a sufficient touch at the back post.
The Sky Blues would pay the price for their profligacy as Dejan Kulusevski combined brilliantly with fellow substitute Spence, who prodded home with two minutes left.
It was Spurs who scented blood and Bentancur threaded a pass through to Johnson, who dinked past Wilson to spark wild away celebrations half an hour after they booed the decision to take off Bergvall.
Postecoglou added: "I don't make substitutions by poll, mate.
Coventry boss Mark Robins lamented his side's inability to take their chances
'I'm sure the fans have got their own opinions, but yeah, Lucas, like I said that's his first sort of significant game time for quite a while.'
Coventry boss Mark Robins said: 'Life presents you with chances and we seem to not take them in this moment in time.
'I look back to the (2023) play-off final, the game against Manchester United and it was there. The game was there tonight and we just didn't manage to take it.
'There is the disappointment, but there were so many positives.'