the 20th minute of the match, Melbourne City goalkeeper Tom Glover threw back a flare sent from the crowd, sparking a pitch invasion which saw both Glover and referee Alex King assaulted by pitch invaders, and causing the match to be abandoned. In response Football Australia implemented interim sanctions closing active supporter bays for both clubs for all matches up to and including 15 January 2023. Sydney FC (The Big Blue): Sydney is considered Melbourne's major interstate rival, due to Melbourne and Sydney being Australia's two largest cities (see Melbourne-Sydney rivalry). Matches between the two teams are regularly controversial and bitter encounters. Strong tensions are also emerging between the supporters from opposing teams, evident in the sell-out crowds. The rivalry between the two teams escalated further after Sydney beat Melbourne in the final match of the 2009–10 season to win the A-League Premiership, and again beat Melbourne in the 2010 A-League Grand Final. However, in season 2014/15, Victory reversed these defeats, by first pipping Sydney to the A-League Premiership during the league season and weeks later beat them in the 2015 A-League Grand Final. This rivalry is also known as "The Big Blue". In the 2016/17 grand final, Melbourne Victory succumbed to a 4–2 penalty shootout defeat to Sydney FC (losing to Sydney in a penalty shootout for the second time). Victory avenged that loss on 28 April 2018 in a semifinal encounter with their old rivals with a 117th minute extra time strike from Terry Antonis to win 3–2 on the night. Since then Victory had 2 wins to Sydney's 1, before the 'sky blue' beat them 6–1 in the 2nd semi-final of 2018–19 a-league season in what has been called, 'The Mother's Day Massacre'. Adelaide United (The Original Derby / The Original Rivalry): Melbourne Victory also has a rivalry with Adelaide United. This rivalry stems from the other football codes, where the interstate rivalry is big between Victorians and South Australians (see South Australia-Victoria rivalry). There have also been altercations between sets of opposing fans in Melbourne and Adelaide. The rivalry has built up from previous encounters, when an incident between the then Adelaide United manager, John Kosmina, and Victory skipper Kevin Muscat took place during a sideline altercation during a match in the 2006–07 season, and when Victory striker Ney Fabiano spat in the direction of Adelaide defender Robert Cornthwaite during Round 4 in the 2008–09 season.