Geelong midfielder Scott Selwood has confirmed he is almost certain to miss at least a week with a hamstring injury.

Selwood spent the last quarter of the Cats' loss to West Coast at Domain Stadium on the bench after suffering a minor hamstring tear on Thursday.

The young brother of skipper, Joel, revealed on K-Rock radio on Monday morning he is set to miss this week's clash with Fremantle at Simonds Stadium, however, did not put an exact time frame on his return.

โ€œI got a little tear in my hamstring,โ€ Selwood said.

โ€œI got pretty good scans results to say itโ€™s not too bad and hopefully I wonโ€™t miss too much footy.

โ€œIโ€™m going to try and push to play as soon as possible.โ€

However, he said the news is not so good for teammate Nakia Cockatoo, who is expected to miss a little longer, also with a hamstring injury.

Geelong was a man down from the opening few minutes, with Cockatoo tearing his hamstring early in the first quarter.

โ€œThatโ€™s Nakiaโ€™s second hamstring in four weeks, so heโ€™ll probably spend a bit more out than what I will,โ€ Selwood said.

โ€œNakiaโ€™s probably got a bit of a different path to me, but hopefully we can get him back as quickly as possible as well.โ€