Western United's inaugural campaign had seen the team finish 5th and advance to the 2020 A-League Finals series, where they won the elimination-final against Brisbane Roar with the only goal from a free kick from Alessandro Diamanti.

[2] The club confirmed four player departures on 31 August 2020 which included Valentino Yuel, Thiel Iradukunda, Oskar Dillon, and Patrick Antelmi.

[3] The club's first transfer of the season came on 2 October, when Western United signed former Melbourne City winger Lachlan Wales on a two-year deal.

[5][6] On 21 October, Jonathan Aspropotamitis departed the club to join Perth Glory and continue their AFC Champions League campaign.

[11] On 27 November, the club signed Spanish midfielder Víctor Sánchez who made over 300 appearances in Spain's top-flight La Liga including a spell at Barcelona for three years.