Before the 7.30pm kick-off, police were forced to use capsicum spray and physically restrain a number of Wanderers fans who joined a group of 50 to 60 people and ran towards Sydney FC supporters in the hope of starting a fight.

After the physical altercation was broken up, police located a number of a bolts - suspected to have been used as missiles – as well as flares and a hammer.

There has been animosity between the two clubs, but Saturday's derby went a step further with 12 flares being ignited before the game, while another nine were let off inside the stadium.

Central Metropolitan Region Commander, Acting Assistant Commissioner, Tony Crandell, said the incidents on Saturday night were unacceptable and were a poor reflection on the game.

"The behaviour of some of the supporters last night, in particular from the Western Sydney Wanderers supporters section prevented those who want to watch the match from enjoying themselves," Commissioner Crandell said. "Last night the safety of the public, staff, and police were put at risk by people who have no respect for the sport.