Double: Kerem Bulut celebrates with Wanderers' fans after his second goal. Credit:Getty Images The atmosphere in the stadium was typically tense, with a sell-out crowd riding each dramatic goal in one the most thrilling games of the season. However, the fan in question appeared to let his emotions get the better of him, apprehending Calver as the 19-year old – who was dropped from the squad for this match – was making his way from the players' corporate box to the dressing room to celebrate with his teammates. Witnesses told Fairfax Media that Calver was asked by the offender whether he was friends with Sydney FC goalkeeper Vedran Janjetovic, at which point the fan said he wanted to "break his [Janjetovic's] legs" and then struck Calver with an open palm. The corporate area of Pirtek Stadium was well-staffed and it is believed the man was swiftly apprehended by security. NSW Police and Football Federation Australia are looking into the incident. It is not known whether the young defender will move to press charges but it is likely the FFA will act to ban the unruly fan. The governing body has handed out numerous five-year bans to several fans across Australia who have been involved in anti-social behaviour.

"It goes without saying that we think that all members of our playing squad should be able to come to any match, watch the game and not be in danger," Sydney FC chief executive Tony Pignata said. "It's quite distressing for Aaron, a young player, who only just turned 19, to be confronted like that. Thankfully security were on the spot quickly and the guy has been apprehended. "Aaron was visibly shaken by the event, as you would be. He wasn't hurt and he will be fine, but you certainly don't expect that – a slap across the face – to happen." When asked if there was more that could be done to protect players, Pignata said they had the right to expect they would have been safe in that particular area. "They were in the coaches' box, which you'd assume to be a fairly safe area [at the back of the grandstand]," he said. "I'll speak to John Tsatsimas [Wanderers chief executive] about it, he's obviously quite upset at seeing this happen as well. Next time we play here we might need to have player security at all times.

"That said, we're fairly sure it will be a one-off event. It's just a shame that it put such a dampener on what was otherwise a great night for Sydney FC and a wonderful showcase for the A-League. We'll just make sure next time that there's proper measures in place." Tsatsimas said he was waiting to get further details before the club decides on what action to take on the rogue fan. "We're certainly aware of the incident and I made sure to speak with Tony and the player involved as soon as I found out about the incident on Saturday night," he said. "We'll just wait for the police reports to come in with all the facts before we can take any further action." Football Federation Australia issued a statement to Fairfax Media indicating it expected an outcome on the matter in the coming days. "FFA is aware of an incident in which a Sydney FC player was involved in an altercation with a patron in a corporate area at Pirtek Stadium," an FFA spokesperson said. "FFA's security team are liaising with the home club Western Sydney Wanderers, Sydney FC and NSW Police. A report on the matter is expected to be finalised in the next few days."