The Socceroos’ 1-1 stalemate with Cameroon in Saint Petersburg on Thursday leaves Ange Postecoglou’s side in desperate need of a win against Chile in the final group stage round.

Even that might be insufficient for Australia to progress to the semi-finals of the FIFA Confederations Cup.

There were reasons for optimism in the opening stanza, the Socceroos controlling possession and maintaining defensive solidity – an improvement having conceded early in their past two matches.

But the Indomitable Lions’ rapid forward trio of Christian Bassogog, Vincent Aboubakar and Benjamin Moukandjo were a persistent threat, and André-Frank Zambo Anguissa gave Cameroon the advantage on the stroke of half-time.

Australia battled back following the break – perhaps inspired by a stern Postecoglou team talk – and skipper Mark Milligan converted a penalty in the 60th minute to bring the teams level.

Despite opportunities for both nations – and two attacking substitutions from Ange – neither side could seal a much-needed victory.

Here are five things we learned at the Saint Petersburg Stadium.

1. Gersbach stars on the wing

A month ago, Alex Gersbach was on holidays.

Following Brad Smith’s injury, the Rosenberg defender was called up as a late addition to the Socceroos squad.

This morning (AEST), he was Australia’s best – and youngest – player. Gersbach excelled in the challenging wingback position and won the penalty.

“Alex played really well tonight,” said Postecoglou. “That was his first game for a while for us, up against some very good opposition.

“He has a great set of feet, great composure, he did well for the penalty and put a couple of balls in – there was one in the first half just over Tomi Juric’s head that could have been a great goal after a great move.”

Following Aziz Behich’s subpar performance against Germany, Gersbach may well retain his spot in the starting line-up.