Premiership coaches Paul Roos and Kevin Sheedy agree that it is up to individual clubs to devise strategies to ensure that off-field misdemeanors do not tarnish the image of the game.

In light of key Collingwood players Chris Tarrant and Ben Johnson being investigated by the police for their part in a street brawl on Sunday night, Sydney coach Roos said that while it is hard for him to cast dispersions on Collingwood counterpart Mick Malthouse's decision not to drop the pair for the side's clash with Adelaide, he believes that staying out late and drinking should be a thing of the past for the modern day footballer.

"Probably the main point, is when you talk about professionalism in football, the guys spend a lot of time on recovery, on diets and those sort of things so if you are going to go out late at night it does affect your football," he said.

"I think from the coaching point of view, I have no comment to make about Collingwood because it is none of my business, but we are always talking to our players about looking after themselves, eating and recovering after the game.

"There are a lot of resources to make sure your players are presenting well every week."

Sheedy weighed into the issue by saying that he can understand why Malthouse may have opted to include the players for this weekend's game, as each case relating to a lack of discipline by players in the wider community must be treated on its merits, but alluded that repeat offenders needed to be dealt with more harshly.

"That is Mick's opportunity and the club's, it is nothing to do with me or any other clubs. That is up to their own club rules, it is a difficult situation," Sheedy said.

"We have looked at it in the past, we have decided not to suspend players and there are times when I decided to suspend players, depending on whether they have had one, two or three options.

"As far as I am concerned strike three and you get a kick in the backside."

The Collingwood duo are no strangers to controversy, with police being called in to deal with another fight the pair were involved with in September 2003 after they retaliated to taunts from patrons in a Lower Plenty hotel. In other incidents, Johnson broke his hand during the early hours of the morning in February 2004 and underwent surgery while Tarrant was involved in a 4am scrap with Essendon hard-man Mark Johnson in August 2004.

Roos, who has opted not to employ a curfew on his players in Sydney, said that while social outings are important for young players in terms of their personal lives and even team bonding, a clear line exists that his Swans are aware of.

"There are times, you have got to understand these are young guys, I mean what is a 23-24 year old accountant doing on a weekend?" Roos posed. "I don't think you can alienate them from the normal population. I think you have to pick and choose your environment, and pick and choose when you can and can't do it.

"The bottom line is it does have an affect on your preparation, it is probably one of the bane of a coach's existence, about when is the right and wrong time because I think it still plays a role.

"For young players to getting to know the older players it is hard to do it downstairs in the locker room when they are intimidated but if you are in a social situation then it is a bit easier for a young player to speak to Barry Hall. So I do think it plays a role you just have to be careful in what you do."