Football Federation Australia said it would wait for the findings of a police investigation before deciding whether to take any action against Western Sydney Wanderers after a violent incident on Saturday evening allegedly involving supporters of the club.

A group of teenage Sydney FC fans was attacked by a group of youths wielding baseball bats at Prince Alfred Park in Surry Hills on Saturday before the A-League match between Sydney FC and Central Coast Mariners.

Tomi Juric of the Wanderers contests the ball. Credit:Getty Images

A 15-year-old boy was hospitalised after the incident, which could test the governing body's willingness to activate a suspended three-point penalty imposed on the Wanderers after clashes between fans before a match in Melbourne on December 28.

The group of teenagers was waiting in the park about 6pm on Saturday when about 15 youths set upon them. It's understood most of the supporters ran to safety, but a 15-year-old tripped while trying to flee and was beaten with sticks, repeatedly kicked and robbed of personal items, including his backpack and shoes. He was taken to hospital with a suspected broken arm but diagnosed with bruising.