WEST Coast veteran Andrew Embley faces a race against time to be fit for round one after suffering a minor hamstring injury in Sunday's 20-point NAB Cup loss to Collingwood.

The 31-year-old premiership wingman injured his right hamstring halfway through the first quarter at Patersons Stadium before being substituted and replaced by Jamie Cripps.

Coach John Worsfold said post-match he was confident Embley would be available for the Eagles' season-opener against Fremantle on March 23, but said age could be a factor in his recovery.  

"It's just a very minor low-grade hamstring," Worsfold said on Sunday night.

"He just thought he felt something grab, so hopefully he might miss next week and that'll be it.

"He is a bit older, so there's those factors that the medicos take into account, but sometimes (with) a really low grade hamstring they only miss the one game.

"I'd be confident he'd be available [for round one]."

Embley's 2012 campaign was ruined by a shoulder injury, but he had enjoyed an outstanding pre-season, running a career-best 2km time trial.

The 2006 Norm Smith medallist, who has played 239 games, signed a one-year deal for his 15th season.

Nathan Schmook is a reporter for AFL Media. Follow him on Twitter: @AFL_Nathan