Patrik Dibrani is angry with the way Granit Xhaka is being treated at Arsenal.
The midfielder faces being stripped of the captaincy after blowing up against the home support on Sunday against Crystal Palace.
Dibrani, of SC Zofingen, is best friends with Xhaka and told Blick: "Granit does everything for football. He had a private coach, renounced party nights and is then insulted. In the stadium and on social media. The comments are below the belt."
Dibrani continues: "I do not understand that everything has turned badly. He was undisputed in Basel as an 18-year-old. He was the youngest captain of Gladbach. He is always a regular at Arsenal. And now he is finished mercilessly. It's not fair."