GEELONG suffered a double blow in Thursday night's physical clash against West Coast with classy young gun Nakia Cockatoo and in-form tagger Scott Selwood suffering hamstring injuries.

After booting the first goal of the game – the Cats' only major in the first term – Cockatoo came to the bench and had his right hamstring worked on.

The 20-year-old briefly returned to the action but soon returned to the interchange and was ruled out for the remainder of the match.

It is the latest in a string of injury woes for the talented Cat, who missed the round 10 win over the Western Bulldogs with a minor hamstring issue. 

Cockatoo's injury continues a run of bad luck at Domain Staidum, where he broke his thumb in round one against Fremantle and missed the next two matches.

The Cats were dealt another blow in the third term with Scott Selwood also hurting his hamstring.

The midfielder was playing just his fourth game of the season and just his ninth for Geelong after two injury-riddled seasons.

"We're pretty confident they're minor (injuries)," Cats coach Chris Scott said.

"But it's hard to get a gauge on it, when they're bad enough for them not to play on obviously there's some significance there.

"They're certainly not bad hamstrings where we're worried about losing guys for a long period of time. But with those minor ones it's really difficult to assess in the short term.

"Suffice to say we don't think it will be more than a couple of weeks."