Southampton could see an exodus of their star players following Nicola Cortese's resignation [EXPRESS]
Saints boss Mauricio Pochettino's future has been plunged into doubt, after he pledged last year to leave should Cortese walk.
And now fears are growing at St Mary's that the core of stars who have impressed at Southampton since their promotion to the Premier League 18 months ago could leave too.
The Blues are likely to improve their offer, while Arsenal and both Manchester clubs are monitoring the situation.
Shaw has been touted as a potential England star, but Southampton's three current England internationals are also wanted men.
England trio Jay Rodriguez (left), Adam Lallana (centre) and Rickie Lambert (right) [EXPRESS]
Adam Lallana - rated at £15m - is a target for Manchester United boss David Moyes, who is desperate to bolster his ranks in January.
Reports suggest that strikers Jay Rodriguez and Rickie Lambert could be on their way too.
Liverpool are eyeing a move for Rodriguez, while West Ham are thought to be in negotiations to land Lambert for £7m.
Nicola Cortese's exit has left Southampton in turmoil [GETTY]
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Saints owner Katharina Liebherr will take over the running of the club following Cortese's resignation, with her immediate task to keep the majority of the squad in tact.
However, it appears there are a number of Premier League vultures circling St Mary's in order to snap up their best talent.