By Edward Chaykovsky

The trash talking between super middleweights Martin Murray and George Groves has gotten personal.

The two fighters will collide in a WBA final world title eliminator on Saturday night as part of the Anthony Joshua vs. Dominic Breazeale undercard at the O2 Arena in London.

Their match is being viewed as a "make or break" contest, with the loser likely facing the end of his career.

Murray has called in to question the heart and desire of Groves. In early 2015, Murray suffered the first stoppage loss of his career after lasting eleven rounds with WBC/WBA/IBF/IBO middleweight champion Gennady Golovkin. Murray moved up to 168-pounds afterwards.

According to Murray, Groves had a sparring session with Golovkin and "quit" after taking too much punishment during the training camp battle. Murray believes Groves mentally crumbles when the contest becomes tougher than anticipated. He says Groves' stamina is another flaw that needs exposing during their bout. Murray feels Groves' stamina crashed in the 2013/2014 knockout defeats at the hands of retired former world champion Carl Froch.

"I've been told that you went home on the second day of sparring Golovkin as you couldn't cope. You quit in sparring with a headguard and big gloves. You are a quitter," Murray told Sky Sports. "He thinks he's the superior fighter because that's the way he is," Murray said. "He thinks he's superior not just as a fighter but in everyday life, that's the way he carries himself."

"I don't think the fight's won on size. He is naturally the bigger man, but I think the fight's won on ability, how versatile you can be, how well you can take a shot and how much you want it. I think I'm better in all those areas, and that's the reason why I'll win on Saturday."