Graham Arnold's warning for new Glory coach Alistair Edwards Warning: Central Coast Mariners coach Graham Arnold. MARINERS boss Graham Arnold has fired an early psychological shot across the bows of incoming Perth coach Alistair Edwards, as the two prepare to meet at nib Stadium tonight. Edwards was this week appointed to succeed Ian Ferguson at Perth, at least until the end of the season, after several years working for Football Federation technical director Han Berger and helping to spread Berger's Dutch-based philosophy at all levels of the game. The switch from football academia to real life might not be straightforward, Arnold hinted. "It'll be interesting to see how well Alistair can implement a curriculum-driven philosophy in a results-based environment," Arnold said. He's only had about three days in charge to try to change things. If we put enough pressure on, players tend to revert to their normal habits. Like any team with a new coach, there's always a reaction. So we've got to make sure we're on top of our game, fired up and ready for a battle. We've shown we don't mind a battle, but ultimately we want to control the game. By the time the Mariners kick off tonight, they will know whether either Melbourne Victory or Western Sydney Wanderers have managed to reduce the gap behind the leaders but Arnold insisted he would have little interest in that earlier tussle. "I'm not worried about Victory or Wanderers, to be honest, I'm focused only on us and making sure we're not our own worst enemy," he said. It's about what we can control, getting a result in Perth and ignoring anything else. Arnold also made note of the achievement looming for long-serving midfielder John Hutchinson, whose latest contract signed this week will bind him to the club for a decade in total. "He's the club captain this season and has done a really important job off the field and on," he said. The senior players set the culture of our place, making sure the young boys do what they have to do.