Nigel Clough is confident James Wallace will still be an integral part of the Blades squad in the second-half of the season.
Wallace, a summer addition for Tranmere Rovers, has been plagued with several niggling muscular complaints since arriving in South Yorkshire and Clough insists those injuries must be managed properly.
He remarked: "James is probably another week or two away from returning to training.
"We want to get him right for the second-half of the season because he still has a big role to play for us from what we have seen in glimpses.
"We have been very pleased and excited with what we have seen, but the key to James his getting him fit."
Clough also believes Wallace has the potential to be a successful performer in the Championship, but first and foremost the midfielder must fully overcome his persistent injury problems.
The Gaffer added: "James is aggressive, we need that, he runs with the ball when he is at his best or, if we prefer, he can sit a bit deeper and pass the ball.
"He is an excellent all-round midfielder when he is fully fit. I would say James would be in the top half of the Championship had he not suffered the serious knee injury at Tranmere Rovers."