Mooy's assist in Huddersfield's 4-1 win over Birmingham was his first goal contribution since January 13, and only his third assist in all competitions. 

The Terriers started brightly against Birmingham in the replay following a disappointing 1-1 draw with the Championship side at home, but it was Birmingham who struck first.

Huddersfield then looked rattled - Town have been in dismal form lately, and are becoming many pundits' favourites to get relegated. But they managed to salvage a goal to take the fixture into extra time.

David Wagner's men, spearheaded by Mooy, then came to life. The Australian assisted Steve Mounie to give Huddersfield the lead on the 94th, before playing a sublime through ball to Tom Ince to set up their third, as Huddersfield raced away with the contest.

The win moves Mooy's side through to the F.A Cup fifth round, where they'll meet Manchester United, who defeated them in their last Premier League match 2-0. 

In other F.A Cup news, James Meredith's Millwall was eliminated in their fourth round replay by Rochdale 1-0. Meredith played by new Millwall signing, Tim Cahill, was ineligible. 

Brad Inman, who is on loan at Rochdale from Peterborough United, will now face either Newport Country or Tottenham Hotspur in the fifth round.

The other surviving Aussies include Jackson Irvine at Hull City, who will face poor-form Chelsea and Callum Elder at Wigan Athletic, who will face Manchester City.

Mat Ryan's Brighton will also play fourth-tier Coventry City, meaning the chances of seeing an Aussie in the F.A Cup quarterfinals is better than ever.