The Spaniard was substituted after pulling up 71 minutes into the game at Loftus Road, which the Merseyside club won thanks to Daniel Agger's header and a Luis Suarez double.

And Pascoe, who led the team in the absence of the ill Brendan Rodgers, has now conceded that Liverpool may be without the full-back for some time.

"Unfortunately it looks like he's got a tear in his hamstring," he told reporters.

"He was terrific today, absolutely superb, and the way he's been performing these last couple of months has been a joy to watch.

"It's a shame, and hopefully he's not out for too long."

The 26-year-old has appeared in 12 Premier Leagues so far this season.