He told Bild: "I was furious because I was of the opinion that Borussia Dortmund shouldn't play like that - against any opponent in the world. I didn't think it could go on like this. I felt insulted in my honour to stand on the pitch in that kit. So submissive, so inferior in footballing terms. The two Stuttgart games and the away game in Leverkusen. That was barricading with 11 men in the box."
Hummels went on to discuss his surprise international snub. He added: “I can understand the idea that a group has been growing since March. It's bitter for me as an individual because I'm currently one of the five best defenders in Germany. I have the self-confidence to say that.
“If I'd had a phase like the one I had recently before the squad was announced in March, maybe I would have been called up - for the European Championship squad now as well.”