![Russian UFC star punches fan on fight walk-out as he jokes about 'going to US prison'](https://cdn.newsserve.net/ONPglobe256.png)
Russian UFC star punches fan on fight walk-out as he jokes about 'going to US prison'
Arman Tsarukyan had a lively walk-out to his fight with former UFC champion Charles Oliveira as he delivered a punch to a fan before he was dragged away
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