Pompey have turned to an oxygen chamber to aid Liam Lawrence’s recovery from injury.
The Blues midfielder has torn his calf muscle which forced him off against Barnsley on Saturday.
But boss Steve Cotterill will be boosted by the return of Kanu tomorrow.
The mercurial Nigerian missed last night’s win over Crystal Palace.
Kanu returned to Africa immediately after securing last weekend’s win over the Tykes, with his mother ill.
He will be back at the club tomorrow, though, as Pompey look to build on three wins on the bounce at Ipswich this weekend.
Lawrence faces a fight to get back into the equation, however.
The 29-year-old suffered a recurrence of the calf problem which has been dogging him in recent weeks.
Scans have revealed a tear, although Cotterill is hopeful the oxygen chamber will accelerate his recovery.
Cotterill is a fan of using the technology to aid rehabilitation, with David Nugent a notable success story this season.
Pompey hope it delivers similar results with Lawrence, who has been a key man since arriving from Stoke.
Cotterill said: ‘Liam will be back in on Thursday for us to look at him.
‘I have to see with that one. It’s day to day with Liam at the moment.
‘The injury’s a tear, it’s how long it takes to sort that.
‘He’s in the oxygen chamber every day and that will help speed up the process of recovery.
‘Kanu’s had a personal issue to deal with. He had to urgently go back to Nigeria. That was on Saturday.
‘He will be back in tomorrow.’