Liverpool defender Glen Johnson will be sidelined for at least a month due to a knee problem but the club are seeking a second opinion before placing a definitive timescale on his recovery.
Johnson sustained a tear in the medial ligament of his right knee and was substituted with one minute remaining of Liverpool's 1-0 win over Aston Villa on December 29.
Despite lingering fears that the injury could prove a long-term one, Liverpool manager Rafael Benitez will only confirm that Johnson will miss at least the next four weeks of the season.
The club have opted to send the England international to another specialist before elaborating further on his rehabilitation period.
"Johnson has a problem, so he'll see a specialist and then we'll talk but we know he'll be out for at least one month," Benitez told the club's official website. "But we are waiting for another opinion and then we'll know how long."
If Johnson is sidelined for longer than a month then he could miss the Merseyside derby against Everton on February 6 as well as Liverpool's trip to Arsenal on February 10.
Following his £18 million transfer from Portsmouth in the summer, Johnson has made 17 Premier League starts for Liverpool.