Liverpool defender Glen Johnson could be facing up to three months on the sidelines after scans on the knee he injured against Aston Villa revealed medial ligament damage.
The England right-back limped out of Tuesday night's 1-0 victory over the Midlands club and left Villa Park on crutches.
He was sent for a scan on Wednesday and although the Reds have not put a timescale on the length of his likely absence, they have confirmed the injury is to the medial ligament.
"A scan today (Wednesday) has revealed a tear in the medial ligament in Glen's right knee," a spokesperson told the club's official website.
"The player will see a specialist tomorrow after which we should be able to more accurately determine the length of his rehabilitation period."
Johnson has been one of few success stories in a torrid season for the Anfield club.
The 25-year-old has made 21 appearances and scored two goals following his £18million arrival from Portsmouth last summer.