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PFL 4 was everything the Professional Fighters League hoped for when it established its playoff format. Six out of eight fights Thursday ended before the final horn, with five first-round finishes dramatically altering the composition of the playoff brackets in the welterweight and women's lightweight divisions.

Preseason favorites Magomed Magomedkerimov and Kayla Harrison settled for No. 2 seeds in their respective divisions, and the playoff brackets are littered with intriguing matchups.

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