Port Adelaide recruit Trent Dumont has been sidelined for an extended period after suffering a knee injury at training over a week ago.

The club confirmed on Tuesday afternoon that the 26-year-old has required arthroscopic surgery on his right knee following the incident, with the former Roo likely to return within the next month.

Dumont hasn't been involved in training since the setback, which has placed his Round 1 chances in doubt.

The injury adds to a growing casualty ward at Alberton Oval, with forward duo Charlie Dixon (ankle) and Orazio Fantasia (knee) both required to go under the knife this pre-season.

Port Adelaide are set to begin their 2022 campaign against Brisbane at the Gabba on Saturday, March 19.

Power fans will also be given an initial look into their side ahead of the home and away season when they clash with the Suns later this month, before facing Adelaide in the AAMI Community Series.

Dumont played 113 games with North Melbourne between 2014-2021 before being picked up in last year's Rookie Draft after being delisted by the Kangaroos.