Spurs entertain Liverpool in the first leg of their semi-final on Wednesday (08.01.25) and the coach feels that winning the trophy amid an injury crisis and poor league form would be hugely important for the club.
Postecoglou said: "We’re having a tough season. Our league form is really poor and we need to improve.
"But we are in a semi-final of a competition and with the group of players we’ve got at the moment, if we can achieve something where they are in their careers, it sets you up really well for what we’re trying to build here. I think it does.
"It’s not the be-all and end-all, as I’ve said many times. But if we get to a final and win a trophy, we’ll look back on this period of where we are as a small group of players having to rise above and beyond to get there. That will be as worthy of the achievement as actually winning it."
It was revealed this week that Spurs captain Son Heung-Min will be staying at the club until 2026 after triggering a contract extension but Postecoglou claims there is no rush to settle the South Korean's longer-term future.
The manager said: "It’s not something that needs to be forced one way or another.
"When you’ve got a player like Sonny who has such a standing at a club – and I know how highly the club regards him and how much he loves the club – I just think it’ll all happen mutually.
"I don’t think the club will be in a position of trying to force anything or Sonny would try and force anything.
"There is enough respect and credit between both parties that those kind of discussions will happen naturally and I think will come to a conclusion that everyone is happy with."