Doubts are now surrounding whether Mauricio Pochettino, Southampton's football manager, will remain at the club.
It's after Nicola Cortese resigned from his post as Chief Executive yesterday.
Katharina Liebherr has now taken on the role of non-executive chairman, with the search having begun for a new chief executive.
There are speculations that Cortese actually tendered his resignation in the autumn, with talks about the 45-year-old Italian considering his position back in May.
At that time, Pochettino warned he would leave Southampton if Cortese chose to do so.
In May, he said, "I would not understand staying in this role if Nicola was not here."
Southampton FC have confirmed the resignation of Executive Chairman Nicola Cortese, in a statement on the club's Twitter feed.
Owner Katharina Liebherr has taken on the role of non-executive chairman.
A statement on the club website says a search has begun for a Chief Executive Officer who will take over Mr Cortese's executive duties.
It is being reported that Southampton Football Club's executive chairman Nicola Cortese is considering leaving the club. The Italian has been at the helm since 2009.
However, it is believed that he is contemplating a move because of divisions between him and Katharina Liebherr, who became the club's owner after her father Markus Liebherr died in 2010.
The Press Association Sport news wires have said that reports that Cortese submitted his resignation in writing are understood to be incorrect.
Southampton FC have not yet made any official comment on the matter.
There is speculation this afternoon about the future of Southampton chairman Nicola Cortese.
Reports suggest he is considering his role at the club.
The 45-year-old has been a key figure at Saints since taking over the day-to-day running in 2009.
There is currently no comment from the club.