Leckie won the Joe Marston Medal as player of the match in City's 1-0 win over Melbourne Victory on Saturday night, despite having his nose splattered across his face after copping an accidental boot early in the second half.
A battered Leckie confirmed after his heroic performance that he had been called up - for the first time under Tony Popovic - for crunch World Cup qualifiers against Japan in Perth on June 5 and against Saudi Arabia in Jeddah five days later.
But the 2022 World Cup hero is now unlikely to go - between both requiring assessment on his face in Melbourne on Monday and a fresh soft tissue injury.
The 34-year-old revealed he had suffered a hamstring injury on Tuesday and had carried it into Saturday's decider, when he starred at defensive midfield - showcasing his grit and versatility.
"I was selected for the national team but now I'm not sure. There's a good chance I won't go because of this," he said.
"But also on Tuesday, I hurt my hamstring, so I basically played with a strained hamstring.
"It was minor but we didn't get it scanned. I didn't want to know it was.
"I just wanted to get through Friday's session. It didn't feel too bad. And then with medication and stuff (I could play)."
Leckie hasn't played for Australia since the June 2024 win over Palestine, when Graham Arnold was still coach.
"I want to be there. I really do," he said.
"I've always said that I love the national team. I love representing Australia.
"But obviously over the last two years, my body's just been a lot of dramas with injuries.
"And as much as I would like to be there, what's happening now with this and recently with my leg, I really, really think I do need just a really good break. And hopefully it all works out for next season.
"Just have a nice break, get through the preseason - because I need a good pre season - not just stop-start. Because I was back four or five times this year.
"I need consistency. My body needs game time, and hopefully with a really good break that'll happen."
He hopes that getting his body right can deliver the consistent form to make a run at a potential fourth World Cup.
"I need to play a really good season to give myself a chance," he said.
"If I'm playing, I'm healthy, playing well, that's what's gonna keep an opportunity to potentially compete."
Leckie could at least soak up his first championship win.
"It feels unbelievable," he said.
"I was saying, if we had lost this game and I walked away looking like this, then I would get devastated. It's all worth it.
"Now we've made another special moment where, when I finish my career, I can look back on and I've probably got scars that'll remind me as well."
