If we're going off the recent events that unfolded during fight week, Round 1 definitely goes to George Kambosos Jr over Devin Haney.
Tensions between the pair boiled over at their media day in Melbourne with the Aussie accusing his opponent of being an "informant" and a "rat".
And the assertions appeared to rattle Haney a bit.
With both men boasting undefeated records, and with every single lightweight belt on the line, it's safe to say there's plenty of bad blood coming into the bout.
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So as we close in on perhaps the biggest boxing event in recent Australian history, the mental warfare and mind games have already started – and Kambosos Jr has come out swinging.
During a press conference on Monday, Kambosos Jr revealed that Haney had sent him text messages about Teofimo Lopez’s camp ahead of their title fight last November.
The Australian went on upset the odds and capture the belts off Lopez, of course, but has now reminded his latest opponent of their secret exchanges a few months back.
“Unfortunately, as we all know, Devin's father Bill is not here at the moment. But I really don't know how they let this guy into the country to be honest. I didn't think they let informants into the country,” Kambosos Jr told the press.
“This guy is an informant. This guy is a rat. I'll tell you why, the Teofimo Lopez fight against a foreigner, his own countryman, he was messaging me. He was telling me all the details.
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“Teo at the hookah lounge, Teo having problems with his wife. This is a rat. This is an informant.
“You know what, on Sunday, I’m going to whip your ass. And you know when you get back to Las Vegas, you’re gonna have to look out for Teofimo Lopez, because he’s going to be looking for you too.”
The comments clearly got under Haney's skin as he hit back at the hometown fighter.
“What is the definition of a rat?” Haney replied.
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“When is the act gonna stop?
“We can see right through it. Just be you, that’s all you gotta do. Be you. You’re acting.”
But Kambosos Jr fired right back.
“I’d rather be an actor than a rat,” he added.
This isn't the first time Kambosos Jr has outed his rival in the build-up to their unification bout.
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Only last week Kambosos Jr shared old footage of Haney and his father celebrating the Aussie's victory over Lopez, running around their lounge room cheering.
Max Sherry