This match is so named because blue is the main colour of both teams' playing kits, and is also Australian slang for a fight or a contest. The rivalry has emerged as a result of a number of spiteful encounters between the teams in recent years, and due to the longstanding rivalry between Sydney and Melbourne, Australia's two largest cities. The teams have competed against each other in three grand finals; in 2010 & 2017, with Sydney winning 4–2 on penalties after a 1–1 draw on both occasions and in 2015, with Victory winning 3–0. In 2010, Sydney FC won the A-League Premiership on the final day of the season by defeating Victory 2–0. A Big Blue match is traditionally played on Australia Day each year.