Martin Murray knows that his aspirations for a fifth world title challenge rest with beating Gabriel Rosado on Saturday.
The veteran middleweights collide in Liverpool and two-time world title challenger Rosado has described the fight as "all or nothing".
"In terms of world title hopes, then yes," Murray told Sky Sports in response.
"No disrespect, but if I can't beat Rosado then my dreams of winning a world title are over. He's been beaten by all the top boys. He gives it a good go, he puts it all on the line, but he's fallen short."
Middleweight king Gennady Golovkin has beaten both of this weekend's headliners, while Murray has also lost world title challenges against Sergio Martinez and Arthur Abraham.
His came closest with his first attempt at the top prize, a 2011 draw with Felix Sturm.
"I feel like I'm better than two of the world champions [Rosado] has fought, David Lemieux and Peter Quillin," Murray said.
"I'm a better fighter than them so if I can't get the same results as them, then my chances of winning a world title are over.
"All or nothing? There will always be fights there, but in terms of winning a world title, if I lose on Saturday they're over."
