The Dutchman was confirmed as the new Everton manager on Tuesday.
The Dutchman was confirmed as the new Everton manager on Tuesday, replacing Roberto Martinez after he was sacked last season.
Koeman leaves the South Coast after a successful two years at the club, with last season seeing them finish in a European place and securing Europa League football for next season.
His move to Merseyside has not been well met by Southampton fans, who have criticised him for making what they perceive as a sideways step.
Nonetheless, Koeman was keen to take to Twitter to thank the club for his time at the helm.
Koeman’s attention now turns towards the work he will do in this summer’s transfer window.
A number of players have already been linked with the club, likely because of the reports of the vast transfer budget he has been handed by Farhad Moshiri.
Perhaps the most important work he will do though is convincing Everton's current stars to stay, with John Stones and Romelu Lukaku both linked with big money exits.
Everton's Romelu Lukaku on the bench