Kim Kardashian Takes a Punch to the Face

Talk about a knock out!

On Sunday's Keeping Up With the Kardashians, Kim Kardashian steps into the ring for a charity boxing match — with harsh results.

She ends up taking several punches to the face.

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"I've never been hit so hard," Kim, 29, says in the clip (above).

Despite her defeat, Kim's sister Khloe — both of whom grace the new cover of Us Weekly (on newsstands now) — was proud of her sib.

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"I'm really impressed," she says. "Kim looks aggressive out there — she's defending herself!"

The full episode of Keeping Up With the Kardashians airs Sunday at 10 p.m./ET on E!.

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