Mitchell Duke celebrated scoring Australia’s winning goal by forming a “J” with his fingers in a tribute to his son Jaxson, who was in the stands.

Coach Graham Arnold dragged injured winger Martin Boyle — on crutches — into the celebratory huddle as fans sang merrily along to Men at Work’s “Down Under,” blaring over the stadium speakers after the final whistle.

Later, Arnold was wiping away tears.

It was an emotion-filled day for Australia, which beat Tunisia 1-0 Saturday for only its third win in 18 World Cup matches.

Duke gave Australia the lead midway through the first half with a header.

“I actually was messaging some of my family, saying that I was going to score today, and I told my son that I was going to be able to share this moment with him and get that celebration,” Duke said. “I haven’t seen it yet but apparently he did it back to me from the stadium, which was a really special moment that I’m going to treasure for the rest of my life.”

Australia hadn’t won at the World Cup since beating Serbia in 2010 and it means the Socceroos still have a chance to qualify for the round of 16, despite losing to defending champion France 4-1 in their opening match.

Boyle was injured a few weeks before the tournament and Arnold explained why he moved him into the team’s staff as “vibe manager” in Qatar.