Carl Dickinson will spend the remainder of the season playing through the pain barrier for the Pompey cause.
The Blues defender has been sidelined in recent weeks with a knee injury.
The Fratton Park medical team believe it’s a complaint which requires surgery to solve.
Yet parent club Stoke disagree.
The Potters’ trusted surgeon has assessed the 23-year-old and ruled an operation is not required at this moment in time.
It means, Dickinson, who has been taking anti-inflammatory tablets to cope, will have to soldier on with his knee problem.
Sure enough, he featured in the final few minutes of Pompey’s victory at Doncaster last weekend.
And Cotterill has admitted the left-back will now be available for duty for the remainder of his season-long loan spell.
He said: ‘Carl went back to see the surgeon at Stoke the other day.
‘The surgeon feels that he wouldn’t want to do anything with the knee at this moment in time.
‘We will go with their wishes - but it is obviously something we have brought to their attention.
‘We didn’t want to find that he went back there at the end of the season and then find there were repercussions.
‘We believe we have certainly done the right thing.
‘Is Carl okay to play? I wouldn’t want to go in depth about it because it’s an awkward one to answer.
‘He has also been taking anti-inflams for a while and that is not necessarily a good thing.
‘What we have now done is stop the anti-inflams with him and we’ll see how he goes from there. This is Stoke’s decision as he is their player and not ours.
‘It’s different because he is a loan player but we have to make sure we look after him as if he was our own.’
Dickinson hasn’t started a match since the 2-2 home draw with Leeds United last month.
Since then, Hermann Hreidarsson has come back into the frame and lined-up in Pompey’s last three matches.
Dickinson has made 27 appearances for the Blues so far during his loan spell, just three of which have come from the bench.