Eubank Jr travels to Williams’ hometown of Cardiff for their middleweight grudge later this month, likely to face the kind of backlash that awaited him in Stuttgart in 2017.
After a fiery buildup, the 32-year-old was the villain of the room inside the Hanns-Martin-Schleyer-Halle before knocking out Yildirim in three rounds.
A similar atmosphere is likely to await him in the Welsh capital, with Eubank Jr believing the lessons he learned in Germany leave him in good stead ahead of the Williams fight.
“I came out to see signs saying ‘welcome to hell’ and ‘you’re going to die’,” he told Sky Sports.
“People were spitting and shouting at me.
“I was there to do a job, not to cling to the crowd.
“The same guys who were booing me were asking me for pictures and saying ‘well done’ afterwards.
“I will have more fans in Wales than in Germany.
“I have to keep a cool head because the crowd will be screaming madly for me, and it’s easy to get drawn into a fight.”