NORTH Melbourne has not cautioned Ben Brown about the shot clock after Port Adelaide forward Charlie Dixon exceeded the 30-second limit on Thursday night, with the Roos confident the forward with the game's longest run-up has a good grasp of the set-shot rule.

Dixon blew a golden opportunity to put Port nine points up late in its two-point loss to Geelong, when he took too long to take a 40-metre set shot and was called to play on.

With Cat Mitch Duncan quickly bearing down on him, Dixon was forced to handball to Justin Westhoff, whose kick ultimately resulted in a rushed behind, which would be the Power's final score.

Two minutes later, Patrick Dangerfield goaled for the Cats to seal a painful loss for Dixon and Port.

Dixon has a relatively standard set-shot routine; his failure to begin his run-up in time was mainly due to the lack of urgency he showed in getting back from the mark.

Brown, however, regularly walks up to 30m away from the mark before taking a set shot.

The Kangaroo spearhead's quirky straight-line run-up has helped him record a 26.11 return in front of goal this year – an excellent 70.3 per cent strike rate.

North coach Brad Scott told reporters on Friday he had no concerns Brown would run foul of the shot clock like Dixon.

"He's all over it, 'Browny', he starts the count in his head as soon as he takes a mark, so he's always right across it," Scott said.

"'Browny' always starts his run-up anyway before the 30 seconds. He certainly doesn't kick it before the 30 seconds most times, I wouldn't have thought.

"Every player has their routine. 'Browny' is a little bit unique, but he's such an accurate shot we're not going to change what he does."

Under the shot clock rule, a player is only required to start his run-up within 30 seconds.