Trevor Birch is confident Kanu’s claim against the club does not stack up.
The Pompey administrator is still locked in talks with Kanu’s representative to negotiate the striker’s exit from Fratton Park.
The FA Cup hero of 2008 has stunned Pompey by handing in a claim against them totalling millions of pounds.
Kanu appears to have signalled his departure from the club, with players entitled to rip up their contract and hand in a 14-day notice after not being paid at the end of last season.
That follows on from him not returning for pre-season training at the start of last week.
The fear is the claim, if accepted, could cripple the club, with the funds coming out of distribution payments earmarked to keep Pompey alive.
Kanu’s barrister, Samuel Okoronkwo, last week indicated the issue had been raised with the Football League.
That’s on top of the £300,000 he is said to be claiming – through a compromise agreement – to tear up the final 12 months of his contract.
Birch explained he is still trying to negotiate with Okoronkwo in an effort to bring an amicable conclusion to the saga.
Birch said: ‘Kanu has handed his notice in as such, in as much as the agent has made it clear he is not returning.
‘I’m talking to his agent and trying to resolve the problem and negotiate a settlement.
‘We don’t think that he has any grounds for his claim.
‘We have to systematically go through it.
‘It’s a challenge, but they are all challenges in their own way.’