Former Everton manager Ronald Koeman was taken to hospital following "chest complaints."
The Netherlands boss has reportedly undergone "successful cardiac catheterisation" according to his management company via the BBC.
Koeman, who took charge of the Blues between 2016 and 2017, is reportedly expected to leave hospital on Monday.
A statement read: "Ronald will need a few days rest, hopefully it will be respected."
Everton posted a tweet this evening wishing Koeman a speedy recovery while the likes of Gini Wijnaldum have also sent their well wishes.
Koeman has been the Dutch coach for just over two years and helped the country to qualify for Euro 2020, which has been postponed to next year due to the coronavirus pandemic.
The former defender, who as a player won the European Cup with both PSV Eindhoven and Barcelona, managed both Southampton and the Toffees before taking charge of his native country's national team.
