Josh Brillante scored the only goal of the game on 38 minutes with an effort from outside the penalty area.

Adelaide gave pre-season debuts to new signings Sergi Guardiola and James Holland.

The reigning champions are away to Newcastle Jets in Round One on Sunday 9 October.

Sydney meet city rivals Western Sydney Wanderers in a bumper opening round derby at ANZ Stadium on Saturday 8 October.

Arnold said his side would need to better in front of goal for Round One.

“We dominated today and I felt we should have had four or five,” he said. “We're looking in good shape.

"When it all starts next week we need to be ruthless in front of goal."