Ahead of their winner-takes-all World Cup playoff against Honduras next month, the Caltex Socceroos are deep into their club seasons.
Here are where five of Ange Postecoglou's key men are in action this weekend.
MAT RYAN (BRIGHTON)
It's a rare Friday night (Saturday morning AEST) game for Brighton and Hove Albion as they face what is shaping as a crucial clash away at West Ham United.
The two sides have identical Premier League records this season, having won two, drawn two and lost four of their eight matches to date.
Ryan will be hoping to continue the outstanding individual form which helped Brighton earn a 1-1 all draw with Wayne Rooney's Everton last weekend.
AARON MOOY (HUDDERSFIELD TOWN)
It's an exciting weekend for Mooy and his newly promoted Terriers team-mates with their first visit to Old Trafford to take on high-flying Manchester United.
After a promising start to the season, Huddersfield have lost their last two Premier League matches and are in danger of falling into the lower echelons of the table.
It'll be a massive challenge though with United having won all four of their home games, scoring 14 goals without conceding any.
TOMI JURIC (LUZERN)
It'll also be a tough challenge for Tomi Juric's side in their upcoming outing in the Swiss Super League.
Having won just two of their 11 matches so far this season and sitting second-bottom of the table, Luzern host table-toppers Young Boys on Monday morning (AEST).
TOM ROGIC (CELTIC)
Following their midweek European Champions League defeat to German giants Bayern Munich, Celtic refocus their attention to the defence of their Scottish Cup crown.
Rogic's side travels to Easter Road to take on Hibernian in the semi-finals on Sunday.
MATHEW LECKIE (HERTHA BERLIN)
Having lost their latest Europa League clash on Friday morning, Leckie's German side will return to Bundesliga action, looking to snap a three-game winless streak in the league.
They meet SC Freiburg, who were on the end of a 5-0 thumping from Bayern Munich in their last outing.
Hertha Berlin are 14th in the 20-team league, with their opponents just two points behind.
Poll: choose your Caltex Socceroos starting XI to face Colombia in London
After Saturday morning’s (AEDT) loss to Norway, the Caltex Socceroos get a chance at redemption when they take on Colombia in London. Coach Bert van Marwijk handed debuts to the likes of Dimitri Petratos, Andrew Nabbout and Aleksandar Susnjar in Oslo and is sure to freshen up
What’s next for the Caltex Socceroos?
While Bert van Marwijk’s debut game as Caltex Socceroos coach didn’t go to plan, the side gets a chance to put things right when they take on Colombia in London on Wednesday morning (Australian time). The South Americans are a dangerous side, having beaten Australia’s Group C
Opponent Watch: Deschamps slams ‘cocky’ France
The Caltex Socceroos weren’t the only team in pre-World Cup friendly action this weekend, with all three of their Group C opponents in Russia featuring in matches. And Australia’s first opponents at the World Cup France suffered a setback in their preparations against Colombia
Analysis: debutants Petratos, Susnjar the positives after Oslo loss
Result aside, Dimi Petratos and Aleksandar Susnjar had assured debuts on Saturday morning. It was encouraging to see two starting XI debutants given a chance in Bert van Marwijk’s first game in charge. REPORT: Caltex Socceroos undone by Norway in BvM's maiden match ANAL