Hermann Hreidarsson will not be running out against his former Pompey team-mates tomorrow.
The popular Icelandic defender left Fratton Park after five years for Coventry in January.
But he saw his season ended by a dislocated shoulder in only his second game for the Sky Blues.
Even if he was fit, Blues boss Michael Appleton believes he would have been ineligible to play under the terms of the transfer agreement.
Appleton said: ‘If we were doing our business right, he wouldn’t have been playing anyway.
‘But Hermann was obviously a fantastic servant to Portsmouth.
‘From the reports I had about the couple of games he did play for them, he did ever so well but then it’s a shame he got himself injured.
‘I don’t know what he will do beyond the end of this season because of his age.
‘But he kept himself reasonably fit and I wish him all the best.’
While Hreidarsson misses out for Coventry, Pompey will again be without Kanu and Aaron Mokoena who have failed to recover from injury.
Appleton said: ‘King has still got a sore back and Aaron Mokoena is still struggling with his ankle.
‘Apart from that, we are pretty much okay.’