The most dramatic moment of Oleksandr Usyk’s title defense against Daniel Dubois on Saturday in Wroclaw, Poland, came in the fifth round.

Dubois landed a punch on Usyk’s beltline, just below the top of his trunks, that put the champion down and hurt him badly. Referee Luis Pabon ruled it a low blow and gave Usyk time to recover.

Usyk went on to put Dubois down twice and stop him in Round 9 to retain his belts.

Afterward, Dubois and his team members cried robbery, insisting that the punch was legal and that their man should’ve been crowned a heavyweight champion.

Check out the punch below and decide for yourself.

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Story originally appeared on Boxing Junkie