Trent Dumont joined Port Adelaide in the off-season after 113 games with North Melbourne. Image: Matt Sampson.

PORT ADELAIDE midfielder Trent Dumont has had arthroscopic surgery on his knee after suffering an injury at training.

Dumont twisted his right knee in a contest at Alberton a little over a week ago and has been unable to complete training since.

The 26-year-old had his right meniscus tidied up on Tuesday and is expected to be back in full training within a month.