Spurs have been heading for a primary Premier League defeat below the Australian after Gustavo Hamer put the Blades forward within the 73rd minute.
However the hosts stored their composure and levelled within the eighth minute of stoppage time via Richarlison earlier than Kulusevski rifled residence the winner two minutes later to spark jubilant celebrations.
It helped proceed the feel-good issue across the membership and Swedish attacker Kulusevski paid tribute to his boss following a fourth consecutive league success.
He advised SpursPlay: “I used to be fairly calm. In the long run I simply tried to remain calm, it is only a recreation of soccer.
“When Richy scored, we knew we’re not going to lose after which I received the ball and did my factor. I do know I simply must make one good factor to attain and that is what occurred.
“We now have received to remain calm. You see our coach Ange, he’s on the facet at all times being very calm so now we have to try this as gamers.
“Keep calm, belief in one another and play like a household. We will enhance lots.
“First half we wished to attain an excessive amount of, we thought we’d rating a variety of targets, however now we have received to remain calm at all times and await the sport to return to us.”
Tottenham’s late present ensured Postecoglou stored his prolonged unbeaten residence league file, which now stands at 50 matches throughout spells with Yokohama, Celtic and Spurs.
The 58-year-old has not tasted defeat in a league fixture on residence turf in nearly three years since Yokohama misplaced to Kashima in November, 2020.
Postecoglou stated: “I do put an enormous emphasis on that wherever I have been as a result of in the end to your supporters, as a lot as you benefit from the away wins as a result of you have to earn each certainly one of them, it is after they come to their residence floor that you just wish to actually reward them.
“I have been very lucky that on the final three golf equipment I’ve had, we have had even in Japan 30,000 to 40,000 and at Celtic they’re at all times offered out and it creates an environment and you’ll see it helps the group.
“I feel that helps you as a membership in the event you’re actually sturdy at residence, so yeah it is one thing I am happy with.”