And with his contract set to expire at the end of the campaign, his future not only at Milan, but in football is in doubt.
Taking to Twitter, SportMediaset journalist Pietro Balzano Prota said: “Bad injury for Zlatan Ibrahimovic.
“Medical tests are expected but it could be a long stop.”
According to Sky Sports Italia via Marca, the former Manchester United marksman is feared to have ruptured his Achilles tendon.
They state that he suffered the injury during Milan training on Monday morning, with the player to now undergoing medical tests where he and the club will discover the severity of the setback.
All signs point towards a lengthy spell on the sidelines for Ibrahimovic, with it remaining to be seen whether he will be fit to return this season.
The four-time Ligue 1 winner has chipped in with four goals and one assist in 10 games in all competitions for Milan this term.