Roma were eliminated from the Europa League by Athletic at San Mames, with Hummels sent off early in the first-half. The Giallorossi lost the second-leg 3-1 and were eliminated at the round of 16 4-3 on aggregate.
The veteran German took to social media last night to post an apology.
Hummels stated: “I am sorry Roma. I want to apologise to our fans and my teammates.
“I let everyone down today with a mistake that was simply stupid and horrendous. These games used to be the games my team could rely on me, now I fu**** up and cost the whole club the dream of winning the Europa League.
"Don‘t know what else to say, I am as disappointed in me like all of you.”
