Derby striker Chris Porter is set to see a specialist again as he continues to battle a niggling hip injury.
Porter, who arrived at Pride Park last year, has not featured in the Rams' last four matches and has only made one start this season.
Manager Nigel Clough has revealed the 26-year-old will visit the surgeon who operated on his hip a year ago in an attempt to deal with the problem.
"He keeps trying to step it up but the hip becomes sore and he has to leave it for a couple of days," Clough told the Derby Evening Telegraph.
"He is going to see the specialist who operated on him because everybody we see gives a different opinion on what the problem is.
"We need to get to the bottom of it and get it sorted out."
Porter was out for almost 10 months last year, during which time he underwent surgery on his hip, but the club recently said the forward's current problem was in the same hip but is not a recurrence of the old injury.
However, Clough admits it is worrying not knowing when the front man will return to action.
"There is a concern when we can't see an end to it," he added.
"We can't seem to get anybody to say 'this is it, and it'll be two months or whatever' and so a plan of action is proving difficult."
Meanwhile, defender Jake Buxton, who is yet to play for the first team this season, went to see a specialist in London earlier this week.
The stopper had surgery on his groin in the summer and is still experiencing some discomfort in his stomach.
Clough added: "Jake is to have an injection next week and we will take it from there."