Glenn Hoddle's Tottenham have also asked to be kept informed of developments but their financial difficulties look set to rule them out of a deal.
Galatasaray have also been offered the chance to take former favourite Hakan Sukur back to Turkey from AC Milan but would prefer Ricketts.
Bolton manager Sam Allardyce is still hoping to add two more players to his squad. He is close to signing trialist goalkeeper Sebastian Chabbert from Lens and is optimistic of landing Real Madrid's Ivan Campo.
Nigel Worthington, who took Norwich to within an ace of promotion to the Premiership, has been rewarded with an improved contract that will keep him at Carrow Road for at least three more years.
Norwich were beaten on penalties in their play-off final with Birmingham at the end of Worthington's full first season in charge.
West Bromwich hope to complete the £2m signing of Preston captain Sean Gregan in time for tomorrow's friendly at Stoke.