The Switzerland midfielder missed the Belgian Super Cup win against Union SG amid intense interest from AC Milan.
After the win, Hayen stated: "The situation is very clear. He should return to training on Monday (today, ed.). But in football, things can be very difficult and this is a truly complex situation. But I have full confidence in the club that they will handle the situation correctly. In any case, we'll see how it ends."
Hayen continued: "I certainly won't reveal what the management tells me. However, I know what they want to gain from his sale; it's all very clear. It's up to them to decide, I'll take care of the sporting side. However, there's an agreement that Jashari will return to training with the team starting tomorrow (today). We'll see how long this situation lasts. I support the club 100%. This is a prime example of how you should try to retain your best players.
"Our group is like a family. They may not agree with what's happening, but everyone knows the dynamics of football and its qualities. We just have to stay calm. It's impossible to predict what will happen in the next few days, especially because AC Milan isn't the only one interested in him..."