PORT Adelaide assistant coach Matthew Primus has been identified as the man responsible for placing a $20 bet on the 2009 NAB Cup semi-final.

On Monday it was revealed the AFL was investigating Port Adelaide under the belief that someone from the club had placed a bet on a NAB Cup match not involving the Power.

Under league rules, players may not bet on AFL games, regardless of whether their team is involved.

The bet included the 2009 NAB Cup semi-final match between Geelong and Carlton as a leg of a multi-bet also involving two English Premier League games.

Primus acknowledged that he had done the wrong thing and was prepared to be punished by the AFL.

“I take full responsibility for the placing of the bet,” Primus said. “It was not my intention to bet on an AFL game but I am well aware of the AFL rules and will accept any sanction imposed.”

Port Adelaide football operations manager Peter Rohde said the club would discuss appropriate sanctions with the AFL.

In 2007, the league fined Adelaide midfielder Simon Goodwin $40,000 for placing four bets totalling $16,000 on AFL matches.

Melbourne midfielder Daniel Ward and North ruckman David Hale were also fined during the same investigation, while Sydney Swan Kieren Jack earned a reprimand.

The AFL found no evidence that any of the four players bet against his own team.