Liverpool are worried that striker Daniel Sturridge's ankle problem is worse than first thought and that he could face a considerable period on the sidelines. The England striker injured his ankle in training on Friday and left the club's Melwood training ground on crutches. However, while it had first been hoped that it was a mere sprain, the club are concerned that a scan may show potential ligament damage, according to the Telegraph. Sturridge damaged ligaments in his right ankle playing for England in June and only made the start of the present season after two months of rehabilitation. The new injury is in his left ankle, but a similar problem could see the 11-goal striker sidelined for at least six weeks. If that is indeed the case then it would be a massive blow to Brendan Rodgers and his side heading into the notoriously hectic Christmas schedule.