The talented full back has not played since sustaining a knee injury in September but is well on the road to making a full recovery.
There had been suggestions he may return to Chelsea ahead of schedule but The Reds have ruled out that course of action.
Head of Recruitment and Scouting Keith Burt said: "We are pleased with Sam's rehabilitation and believe his return to full fitness will be a matter of weeks rather than months.
"Sam has already shown our supporters that he is a player of enormous talent and we believe we can offer him the perfect stage to fulfill his vast potential.
"Our owner Fawaz Al Hasawi is committed to providing the best medical care to all of our players."