Koeman has been on the books of Southampton since the summer of 2014 and has a contract until June 2017, according to Transfermarkt.co.uk.
The Dutchman has done a wonderful job at St. Mary’s Stadium, but he has been linked with a move away this summer.
According to The Sun, Everton are interested in appointing Koeman as their new manager.
Long hopes that Koeman remains at Southampton next season, but he has admitted that he is unaware of what is going on at the moment as he is on international duty with the Republic of Ireland.
“He’s been brilliant for me, you can see how much my game has come on and I hope he does stay,” Long told Sky Sports about Koeman.
“We are kind of cut off from the outside world here. I don’t know much about what’s going on. I think you know more than I do. Hopefully he’s still there come the summer, but we’ll see.”
Long himself has been linked with a move away from Southampton in the summer transfer window.
According to a recent report in The Mirror, Liverpool and Tottenham Hotspur are interested in signing the former West Bromwich Albion and Hull City forward this summer.