Sermanni will take charge of Australia for the 150th time when they host Argentina at Marvel Stadium on Friday night, in the first of two international friendlies.
Arsenal stars Caitlin Foord, Steph Catley and Kyra Cooney-Cross are set to arrive in Melbourne little more than 24 hours ahead of kick-off, fresh off their historic 1-0 triumph over Barcelona in Lisbon.
Their roles in the first Argentina clash are yet to be determined.
But veteran midfielder Emily van Egmond expects the trio's presence in camp to give the Matildas a huge boost regardless of how heavily they feature on the pitch.
"There will be a massive positive vibe around them," van Egmond said.
"Honestly, the girls will probably just want to ask them a bunch of questions about how it all went.
"It's a huge credit to them, they've worked so hard and I'm just really, really happy for the girls to be able to experience that.
"Not a lot of people in their careers would even get to play Champions League, so to be able to come out and say that you're a winner is amazing."
Foord, Catley and Cooney-Cross joined their national teammate Ellie Carpenter, victorious with Lyon in the past, as Champions League winners.
Fellow Australians Zeljko Kalac, Harry Kewell and Craig Johnston are also past winners in the men's edition.
The Arsenal trio's continental success came in the same week as former Socceroos boss Ange Postecoglou guided North London rivals Tottenham Hotspur to the men's Europa League crown.
"They must be on cloud nine and hopefully they come into camp and bring that positive energy with them," van Egmond said.
Sermanni, who returned as interim coach after Tony Gustavsson departed last August, is in his third stint in charge of the Matildas.
The 70-year-old famously guided Australia to the Women's Asian Cup title in 2010.
"Tommy's been around, it feels like, almost forever," van Egmond said.
"They won in 2010 the Asian Cup, which was a massive achievement.
"He's brought through a lot of the girls that are in the team now, including myself ... and he's been fantastic whenever he's been in the role."
Joe Montemurro looms as the next Matildas coach, with an announcement expected next month.
Van Egmond predicts tough encounters with Argentina, who upset seventh-ranked Canada in one of their two meetings last month.
"It'll be a physical game again, probably not too dissimilar to Brazil," van Egmond said, noting the Matildas' two losses to the South American champions late last year.
"They're quite street savvy, so it's a good opportunity for us to get two other friendlies under our belt before the Asia Cup (next year).
"And to play against different opposition is always nice."
The Matildas and Argentina also lock horns in Canberra on Monday.
More than 35,000 tickets have already been sold for the Marvel Stadium contest despite it clashing with an AFL blockbuster in Melbourne on the same night.
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