Harry Redknapp, who replaced Perrin at Fratton Park when he returned from an ill-fated spell at Southampton in December 2005, has recently splashed a club-record £7million fee on Ghana midfielder Sulley Muntari.
And he would have to pay close to £5million for Frenchman Diarra, who is thought to have become disillusioned at Lyon since former Liverpool chief Gerard Houllier quit two weeks ago.
© Copyright PA Sport Ltd 2007, All Rights Reserved.
Do YOU want to write for GiveMeSport? Get started today by signing-up and submitting an article HERE: http://gms.to/writeforgms