The reigning champions found themselves 2-0 down against Western Sydney Wanderers before they fought back in front of 34,810 fans at Allianz Stadium.

The Irish-Aussie joined Sydney after leaving hometown club Perth Glory in 2015 and said the supporters had an impact on their performances.

โ€œThereโ€™s a legitimate connection, 100 per cent,โ€ Oโ€™Neill told FourFourTwo.

โ€œThere was a moment where I won a corner, I looked at the fans and they looked at me and itโ€™s like you have a genuine connection.

โ€œItโ€™s a โ€˜youโ€™re with me and Iโ€™m with youโ€™ type of thing and itโ€™s a great feeling. They came out in numbers, they drove us to get the result tonight and the boys feed off that.

โ€œDerbies are why you play football, itโ€™s what I dreamt โ€“ walking out into packed stadiums to playing games like that. No matter how much you build it up in the media during the week, thereโ€™s nothing like walking out of the tunnel and onto the pitch.โ€

Oโ€™Neill also scoffed at suggestions there was a championship hangover and pointed out they were still undefeated so far.

Sydney are also into their second consecutive FFA Cup Final awaiting the winners of Tuesdayโ€™s clash between Wanderers and Adelaide United.

โ€œYou can definitely see from the second-half performance against Wanderers, thereโ€™s no hangover,โ€ he said.

โ€œWeโ€™re out this year to win every game we play in and we shouldโ€™ve done that tonight.

โ€œWe all know we can do a lot better defensively, especially the two goals we conceded werenโ€™t dealt with and they were sloppy.

โ€œWeโ€™ll look at it this week, we have the players that know how to change that, we have really good defenders and if we werenโ€™t playing good football Iโ€™d be a lot more worried.โ€

Sydney play Oโ€™Neillโ€™s former club Glory next Friday at home.