Southampton could find themselves in crisis this week with doubts surrounding the future of manager Mauricio Pochettino. Pochettino is today expected to field questions about his position at the club following Wednesday night's resignation of executive chairman Nicola Cortese amid a power struggle. Cortese stepped down after a reported dispute with club owner Katarina Liebherr, who confirmed last night the departure of the influential Italian-Swiss banker. The Saints now fear the fallout from Cortese's exit will lead to Pochettino also walking out on the St Mary's outfit, with the Argentinian stating in the past he would leave if Cortese did. "We are on the same wavelength about the club and the future of the club so it really would not make any sense if I was at this club and he was not," the South American said last May. Southampton have enjoyed considerable successes under both Cortese and Pochettino, with Cortese leading them to back-to-back promotions into the Premier League in 2012. Pochettino then helped them stay in the topflight when he replaced Nigel Adkins almost exactly one year ago this week and has the side up into 9th in the table presently. His exit alongside Cortese's would be a devastating blow for Southampton and, with the odds on him becoming the next Premier League manager to leave being slashed to an outrageous 1/1, here we take a look at 5 potential replacements.