Groin injury sidelines North defender Scott Thompson

North Melbourne defender Scott Thompson will miss the final round of the season due to a groin injury.

The injury forced Thompson to miss Round 21's clash with Hawthorn, before aggravating the injury during last weekend's loss to the Swans.

"Scott was symptom-free going into the match and was passed fit, but unfortunately strained his groin early against the Swans," Kanagroos football manager Geoff Walsh said.

"He'll miss this week but we have some time to prepare him for the finals."

Meanwhile, Sam Wright and Ben Jacobs are also racing the clock to be fit for the first week of finals.

"For Ben, his foot surgery was deemed a success but after playing a game in the VFL a few weeks back, he reported some ongoing soreness," Walsh said.

"Sam also played a game in the VFL and pulled up a bit sore afterwards which prevented him from playing back-to-back games.

"With both players, it will be a situation where we'll have to monitor them closely before making any decisions on when they might be available to play again. It's a wait and see."