(REUTERS) - Liverpool striker Daniel Sturridge is an injury concern ahead of the English Premier League leaders' trip to Norwich City on Sunday because of a muscle strain.

The England forward was forced off the field after 66 minutes of the 3-2 win over title rivals Manchester City on Sunday with what appeared to be a hamstring problem.

"Sturridge has since undergone further assessment with the club's medical team at Melwood and a small strain was detected following a scan," Liverpool said in a statement on their website (www.liverpoolfc.com) on Wednesday.

The 24-year-old former Chelsea and Manchester City forward has scored 20 goals this season and formed a lethal partnership with Uruguay striker Luis Suarez to leave Liverpool close to their first top-flight league title since 1990.

Liverpool top the table with 77 points from 34 matches, two clear of Chelsea, with City on 71 after their 2-2 draw with Sunderland on Wednesday but with a game in hand.

After the trip to relegation-threatened Norwich, Liverpool host title rivals Chelsea and then face Crystal Palace away, before ending their campaign at home to out-of-form Newcastle United.