Collingwood midfielder Taylor Adams has confirmed he could be sidelined for up to a month after suffering a groin injury in his side's win over Port Adelaide on Friday night.

The Magpies have labelled the injury as a left adductor strain, and Adams says the injury is worse than the club first expected.

"It's probably worse than we first thought," Adams told Fox Sports.

"We first thought it was muscle. It's not muscle, it's tendon so that's obviously not a great sign.

"I imagine I'll miss at least a couple of weeks and probably pushing closer to four or so."

The injury will see Adams miss games against Carlton and St Kilda, with the Pies to also face Sydney and Fremantle over the next month.

Collingwood has begun the 2019 season in strong form, and currently sit in second on the ladder with a 5-2 record.