Wolves keeper Matt Murray has played down fresh concerns following his latest aborted comeback from injury.
Murray, who has not featured in the first team for two years following a horrendous run of injuries, lasted just 23 minutes of Tuesday's second-string victory over Birmingham City.
The 28-year-old keeper felt slight discomfort in the same knee which was operated on last year and was taken off as a precaution.
Murray damaged his patella tendon while on loan at Hereford United last season.
"It's frustrating because I wanted to play on particularly because there were people at the game but it's better to be safe," Murray told the club's official website.
"The most important thing is completing my recovery - this was just another step on my rehabilitation and when you've been out for so long then these things can happen.
"I've been training well for the last three or four weeks and I've done my first warm-up for a game for a long time and that felt good.
"But I just felt a little bit of discomfort in the early stages and the medical team felt there was no point in trying to carry on and play the 90 minutes and take any risks.
"It's better to take the precaution, see how things settle down and then carry on my rehab."