Southampton have sacked manager Nigel Adkins after two and a half years in charge and appointed Argentine Mauricio Pochettino as manager.
The Saints came from 2-0 down to draw with Chelsea on Wednesday and are currently three points clear of the relegation zone.
Adkins, 47, took the club from League One to the Premier League with successive promotions.
Pochettino, 40, will take charge against Everton on Monday.
The Argentine left Spanish side Espanyol in November and will lead training on Saturday for the first time.
Southampton chairman Nicola Cortese said in a statement: “This decision has been made with the long-term ambitions of Southampton Football Club in mind.