UFC 193: Ronda Rousey expects Holly Holm fight to be 'biggest challenge yet'
Ronda Rousey previews her UFC 193 fight with Holly Holm and explains how Holm's boxing background could give her trouble in the octagon.
Ronda Rousey previews her UFC 193 fight with Holly Holm and explains how Holm's boxing background could give her trouble in the octagon.
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