Russell Martin was fired as Southampton’s manager after the team lost to Tottenham 5-0 on Sunday, leaving them nine points from Premier League safety.
In his first season as manager, Martin, 38, led the Saints to promotion last year after defeating Leeds United in the Wembley play-off final.
However, Southampton’s 13th league loss out of 16 games this season came against Spurs.
Despite having a league-low 11 goals this season, the St. Mary’s team has only triumphed once, against Everton in November.
“Going into the start of the season, we all knew the challenges that we would face this year as we readjusted to life in the top flight, competing in the best and most competitive league in the world,” said a Southampton statement.
“However, the reality of our situation is clear. The board have supported Russell and his staff and been open and transparent regarding our expectations.
“We have all been on the same page in recognising the urgency of needing results to improve.
“We would like to take this opportunity to thank Russell and his staff for all the hard work and dedication they have given the club on and off the pitch over the last 18 months.
“Everyone connected with Southampton FC will always have fantastic memories of last season, especially the play-off final win in May.”
The senior team’s first match under interim manager Simon Rusk will be a Carabao Cup quarterfinal at home against Premier League leaders Liverpool on Wednesday.
Martin was fired on the same day as Wolves, another struggling team in the top tier, fired manager Gary O’Neil.