The trash talk between the two men is beginning to heat up, with the super-fight less than two months away.
But McGregor has taken things up a notch or two, by channelling the cold-hearted Russian villain of Rocky IV. To read the full story click here.
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Fighter Timeline: Cain Velasquez
To kick off Hispanic Heritage Month, the Fighter Timeline series features Cain Velasquez and five of the biggest fights of his UFC career.