World champion George Kambosos Junior proved it's not the size of the dog in the fight
when he gave Anthony Mundine a torrid time in sparring when the NRL star turned boxer was in his prime.
The lightweight champ would have been around 15kg lighter than the former super middleweight
Mundine didn't go flat-out against Kambosos to begin with due to his huge size and reach advantage,
but quickly changed his tune after getting a taste of what his opponent is all about.
He put it on me! I was a pay-per-view star and in my prime, and he came to test himself to see where he is at
Mundine - pictured in his second fight against Danny Green - couldn't get over the top of Kambosos
I thought I'll work with this bloke, see how he goes. He started giving me hits to the body
'I was like, you're serious, so I stepped it up a bit. I put it back on him. I thought I better let this bloke know
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