Harry Redknapp is desperate to keep hold of Kanu and Campbell

On Monday, in-form striker Kanu, 30, said he would like to return to Dutch side Ajax, while defender Campbell, 32, has been linked with champions Chelsea.

But Redknapp said: "Kanu can't go. He's under contract here. He's been great but he hasn't spoken to me about this.

"As for Sol, I've heard nothing. We need to keep him, he's our backbone, there's no way we can let him leave."

Pompey's top scorer Kanu told the Vanguard newspaper he believes the club should let him leave to go back to his old employers Ajax.

"I want to go to Ajax. Portsmouth should be grateful for what I have been able to do for them and allow me to go," said the Nigerian.

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"I am waiting for Ajax's offer. I have told Portsmouth I want to leave. My mind is made up. I have great memories of Amsterdam and I know great things can happen there if we return."

But Redknapp replied: "Kanu signed a year's contract in August and if he had been useless instead of scoring goals for us we would still be paying his wages. He can't have it all ways.

"Ajax haven't spoken to me. I wouldn't want to keep anybody who was unhappy but I love Kanu."

Campbell has been tipped for a shock move to Stamford Bridge to shore up Chelsea's leaky defence, which has seen them concede six goals in three games without injured captain John Terry.