Southampton left it until after 10pm on Wednesday to announce the sacking of manager Claude Puel.
The Saints finished the season in 8th, after suffering 16 Premier League defeats.
They reached their first major final since 2003 but were beaten in the EFL Cup decider by Manchester United.
The club say: "The search for a new management team is under way."
SOUTHAMPTON STATEMENT IN FULL
Southampton Football Club can today confirm that it has terminated the contract of Claude Puel with immediate effect.
Everyone at Southampton would like to express our thanks to Claude for his hard work and commitment this year. The highlight of the season was a memorable day at Wembley in the EFL Cup Final, a day our fans will always treasure.
We wish Claude well for the future.
The search for a new management team is underway. We are confident that we will find the right fit in line with the long term vision of the club.