James DeGale has given up his European super-middleweight crown to focus on his pursuit of a world title.
DeGale defeated Pole Piotr Wilczewski in October last year to win the belt and defended it twice against Cristian Sanavia and Hadillah Mohoumadi.
The 26-year-old registered a wide points decision over Fulgencio Zuniga 10 days ago to land the lightly regarded WBC silver title.
"It has been an real honour to be EBU champion and it's a shame that I have had to choose between the two championship belts I hold," DeGale said.
"However, I feel my decision to relinquish the European belt is the right decision at this stage in my career.
"I've won it and defended it twice and I feel the best course of action is to defend my WBC belt on route to a world title.
"The WBC belt will give me a wider choice of world class opponents."