Southampton were predicted to be in a relegation scrap having lost Calum Chambers, Dejan Lovren, Luke Shaw, Adam Lallana and Rickie Lambert - but the pundits couldn't have been more wrong.
That leaves Southampton pushing for a European place this season, and Koeman is a large reason for that having rebuilt a decimated squad.
The former Feyenoord boss has enjoyed success with a number of different formations this season, whilst many of his summer signings have impressed at St. Mary's Stadium.
Unsurprisingly, Koeman's exploits on the South Coast have attracted interest, with Southampton reportedly concerned earlier in the season that he would leave in order to replace Guus Hiddink as the manager of the Netherlands national team.
Now though, they face a much bigger and much more attractive threat; Barcelona.
With the sacking of sporting director Andoni Zubizarreta, the Catalan giants are set for a full-scale overhaul of the staff at the Camp Nou, with manager Luis Enrique also under pressure.
Reports in Catalunya suggest that Barca have already contacted potential replacements for Enrique, with ex-Brighton boss Oscar Garcia believed to be in the frame.
However, the favourite with the bookmakers is Koeman, who is considered to be something of a Barcelona legend from his playing days with the club.
As a player, Koeman played 264 games for Barca, scoring 88 goals - as a defender! Koeman's record was simply staggering, and he's best known for scoring a dramatic winner in the 1992 European Cup Final against Sampdoria, with Koeman smashing home a superb free kick.
Koeman is the 3/1 favourite with bookmakers, and a return to his former club could be hard to turn down if they do approach Southampton.