McGregor vows to 'spark out' Mayweather

Conor McGregor vows to "spark out" Floyd Mayweather as the build-up to Saturday's big fight in Las Vegas gathers pace.

The opening event in the build-up to potentially the most lucrative fight in boxing history produced chaotic scenes as the two boxers came face-to-face.

McGregor told his Irish fans to "run amok" in Las Vegas as he also confronted former sparring partner Paulie Malignaggi while Mayweather opted for a more subdued presence.

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