Premier League chiefs are expected to decide this week whether to charge Portsmouth over the alleged 'tapping up' of returning manager Harry Redknapp.
Officials have already asked Pompey for their side of the story over reports that Redknapp met with chairman Milan Mandaric before his then club Southampton were asked for permission.
And they are likely to launch an inquiry over both Redknapp's return and the unusual betting patterns prior to his re-appointment, which the 58-year-old has made it clear he was unaware of.
Pompey's move for Redknapp just over a year after his departure from the club brought a furious riposte from Southampton chairman Rupert Lowe.
Lowe insisted the affair had not all been conducted above board and made his feelings clear when the move was concluded at the beginning of last month.
Lowe said: 'We do not believe that this episode has been conducted within the rules of the game and have made our understanding of the last week available to both the Premier League and the Football League.'
However Mandaric responded: 'I have done everything properly and consulted with the Premier League. I have done nothing wrong.'
Last year Chelsea were handed a £300,000 fine for making an illegal approach to Arsenal defender Ashley Cole while the player was still under contract.
But if Pompey are charged specifically in relation to the betting issue it would be unchartered territory for the authorities.