The Football Association are being put under pressure to hold an inquiry into Harry Redknapp's recent departure from Southampton to rejoin Portsmouth.
A letter from Saints chairman Rupert Lowe to the Premier League outlined concerns that Redknapp's move provoked unusual betting patterns, with more than £16.5million being staked on the switch.
The Express newspaper reproduced the letter, which also described Lowe's concern's over the conduct of Pompey chairman Milan Mandaric, saying: 'The fact that Harry Redknapp was under contract to Southampton did not stop Mandaric making public statements about his return to Portsmouth, despite the fact that he had not requested our permission to approach him.
'Mandaric seems to make a habit of conducting his affairs via Sky Sports and openly discusses his plans even though they involve employees of other football clubs.
'This is against both the spirit and letter of football law and brings the game into disrepute,' he added.
'The betting situation is, in my opinion, also unacceptable and brings with it a very unpleasant and unprofessional smell.'