KSI showed off his serious right-hand power as he took on the punch machine challenge.
The YouTuber-turned-fighter was inactive for a while after his 2019 win over Logan Paul and only made a return to the sport in 2022.
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Now 29, KSI is involved in a several other passions including his music and entertainment careers.
Last year, he also teamed up with his old foe Logan for a joint business venture.
In January 2022, the pair confirmed the launch of their new drinks company Prime.
Shortly afterwards, they put together a series of social media videos to advertise their new product.
One of these saw KSI take on the punch machine challenge.
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The video began with KSI saying: "Alright, this is without Prime."
He takes a half-hearted swing at the punch machine and scores 620 points.
"You need Prime," someone shouts from the background.
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KSI turns and says: "I need to hydrate," before taking a swig from a Prime bottle.
He then has a second attempt and scores 793 before turning to the camera and jokily adding: "Stay hydrated, drink Prime."
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Since making this video, KSI has properly returned to boxing.
In August 2022 he faced two opponents in one night, beating both Swarmz and Luis Alcaraz Pineda.
And now he is due to face FaZe Temperrr on Saturday night.
