Perth Glory are determined to hold onto defender Rhys Williams and not lose him to an approach from Sydney FC that they regard as disrespectful.
The 28-year-old is wanted by the league leaders, and Perth have done little to help that situation by leaving him out of the last three games.
Williams is entitled to talk to other clubs under A-League rules, as his marquee contract expires at the end of this season.
But the club's CEO Peter Filopoulos has made it clear the Glory are furious with Sydney FC's pursuit of their defender.
Sky Blues coach Graham Arnold said with the transfer window opening, they would be looking at Williams as he was a "top-quality player".
Filopoulos, though, insists that as Williams is contracted to his team Arnold shouldn't be discussing interest in him.
He says there is a clause in the defender's contract that could see him stay with the Glory for another season.
"It's disrespectful and damaging to our football club," said Filopoulos of Arnold's comments. "We are a proud club with over 20 years history and we will not accept this intolerable behavior by a rival club."
Williams, who joined after spending nine years with Middlesbrough, has also been linked with a transfer-window move to Asia.
The 14-cap Socceroo has only started seven of Perth's 13 A-League games this season. He doesn't have the best of disciplinary records since returning to Australia, having picked up six yellow cards.
Perth are hoping to ward off any further interest in their players as they look to recapture some form in the league. They haven't won in six games, picking up just three points in that time.
Perth are 10/1 to win the Grand Final.
The Glory are 10/11 to win their next game against Wellington, who are 14/5 with the draw 14/5.