Emyr Huws has been involved in the first two days of pre-season training, the Wales international having missed the whole of last season and the second half of the previous campaign.
Huws, 25, made a couple of abortive comebacks last season having suffered the injury at Middlesbrough in December 2017.
"He’s doing okay, he’s worked hard over the summer and he got yesterday under his belt, so he’s doing all right and touch wood he’s had no reaction to his knee,” manager Paul Lambert said.
"He’s a very talented footballer, but he hasn’t played for a long, long time so we have to get him back to the level I think he can do, and he can do it. I think for Emyr the important thing is he can stay fit.”
Asked whether there was a chance Grant Ward, released at the end of the season but still undergoing rehab at Town having suffered an ACL injury at QPR on Boxing Day, Lambert said: "I had a chat with Wardy at the end of the season, and the club had the option, and we agreed that we wouldn’t take up the option.
"Wardy is doing his rehab here which I think is only right because he got injured playing for us, so that’s the way it stands at the minute and don’t really have any plans to sustain it.”
Meanwhile, out-of-contract, England U18 international right-back Dylan Crowe, who has been linked with a number of clubs, most recently Celtic and Huddersfield, was spotted at Playford Road but Lambert says there is currently no change in the 17?-year-old’s situation.
"No, it’s still the same as what it was,” he said. "I’m pretty sure if you’d not seen him then you’d have said ‘Where is he?’, but you’ve seen him. It’s the same situation as what it was.
"My main focus is here on the first team. Dylan’s situation is what it is. It’s the same. The first team is the most important thing at the minute.”