Portsmouth have become the latest club to show an interest in West Bromwich Albion centre back Curtis Davies.
The former Bournemouth, West Ham United and Southampton boss is keen to strengthen his back-line at Fratton Park, as the South Coast side just survived relegation from The Premiership this past season.
The former Luton Town man, who moved to West Brom on the final day of last summer's transfer window for £3 million, has already been the subject of a move away from The Hawthorns.
The Baggies rejected a £3.5 million offer from Tottenham Hotspur for the 21-year-old last month, with manager Bryan Robson stating the youngster is not for sale.
Despite reports that Pompey are ready to table a £5 million bid for Davies, Redknapp is aware that such a deal may be expensive to complete.
"Curtis Davies is a young one with great potential," Redknapp told The News. "But it all depends on how much he costs."
Meanwhile, Redknapp has ruled out the possibility that his son Jamie will join him in his coaching staff for next season.
The former England international, who ended his playing career a year ago following Southampton's relegation from The Premiership, is happy to continue with his work as a football pundit with Sky Sports.
"I don't think Jamie will be coming," added Redknapp snr. "He enjoys his work with Sky and he is not desperate to move into coaching."
Pompey are looking for a number two after Kevin Bond left the role to join Newcastle United's backroom staff.