The Blackburn right-back ruptured an achilles in the 3-1 win at QPR last weekend, ending the 25-year-old's fight to keep Rovers in the Championship and his dream of getting on the plane for Australia's trip to Canada and the USA later this year.
Former Central Coast Mariners defender Miller moved to England after three solid seasons with Hibernian in Scotland and was a mainstay in Blackburn's backline, wearing the captain's armband on numerous occassions during a campaign which had yielded two goals in 32 matches.
Since making his international debut at Wembley Stadium against England in 2023, the Sydneysider has gone on to earn 20 caps and played in the national team's last 14 matches - starting in 11 of them.
The form of Miller's Socceroos teammate Riley's McGree heading into the World Cup is one to excite, but the Middlesbrough attacking midfielder will also be feeling a little flat on Monday night (Tuesday AEDT) after their latest Championship clash.
The 27-year-old, who has netted four goals and provided three assists in a 13-game injury-plagued season, scored in his side's 3-1 loss at in-form promotion rivals Coventry City.
A Haji Wright hat-trick sent Frank Lampard's Sky Blues back to the top of the table, on 62 points and one clear of Boro after 32 of 46 games.
Having gone behind in the 21st minute, McGree got the visitors back in the contest by blasting home with his weaker right foot to set up a nervy last quarter for Coventry.
But two more goals by US international Wright, making it 13 for the season, sealed all three points for the hosts.
The Sky Blues had relinquished a 10-point lead at the top of the table to their opponents, but a dominant performance at the Coventry Building Society Arena saw them move one step closer to the Premier League.
"Massive performance from the lads. What a high-class opposition as well by the way," Lampard said after a first victory in three games that also ended Middlesbrough's six-match winning run.
"Really delighted with the result. It's a big one tonight.
"We can't over celebrate though, it's just a moment. It's the Championship and it's onto the next one ... we have 14 more to go now."
With PA
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