James DeGale's trainer Jimmy McDonnell has questioned the logic of Adam Booth allowing George Groves to face his man.
The pair meet on May 21 at the O2 Arena, London, in a showdown for the British and Commonwealth super-middleweight titles.
And McDonnell believes there will only be one winner.
"George needs to improve a lot, his defense is terrible, it's wide open," said McDonnell.
"It's too early for George and he knows it. George, get your career back on track, learn your trade.
"A year ago this fight was a real 'who's going to win?'. But now everyone knows James will win the fight.
"Taking the fight now is about ego and it's madness. They're mad. He's trying to be David Haye, but he isn't David Haye."
Tags: James DeGale , George Groves , DeGale vs Groves , DeGale-Groves