Fighter slaps his opponent during UFC Vegas 9 face-offs (Video)

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The UFC Vegas 9: Overeem vs. Sakai athletes weighed in at the Apex in Las Vegas on Friday. Watch as Alistair Overeem, Augusto Sakai, and the rest of the UFC Vegas 9 fight card square off for the cameras following the weigh-in.  Things got physical between welterweights when Michel Pereira slapped Zelim Imadaev during their face-off. 

UFC Vegas 9 (aka UFC on ESPN+ 34) features No. 6 ranked heavyweight Alistair Overeem and No. 9 ranked Augusto Sakai.

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TRENDING > Watch Alistair Overeem knock out Walt Harris ahead of UFC Vegas 9

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UFC Vegas 9: Overeem vs. Sakai weigh-in results

Main Card (8 p.m. ET on ESPN+)

• Alistair Overeem vs Augusto Sakai
• Ovince Saint Preux vs Alonzo Menifield
• Michel Pereira vs Zelim Imadaev
• Brian Kelleher vs Kevin Natividad
• Thiago Moises vs Jalin Turner

Prelims (6 p.m. ET on ESPN+)

• Andre Muniz vs Bartosz Fabinski
• Viviane Araujo vs Montana De La Rosa
• Alexander Romanov vs Marcos Rogerio de Lima
• Cole Smith vs Hunter Azure