Fighters take a risk each time they enter the boxing. For Kuba Moczyk, his first time would be his last time.

The 22-year-old boxer died after being knocked out in his first amateur bout Saturday at the Atlantis Arena in Great Yarmouth, Norfolk, England, according to multiple reports. The Polish-born Moczyk suffered a brain bleed after being knocked out in the third round, his twin sister Magdalena wrote on a GoFundMe page, which had raised £4,358 in three days towards medical bills.

Moczyk had trained four months for his debut against a 17-year-old opponent, and worked in a chicken factory in Great Yarmouth.

“Kuba had been training for a long time and it was his dream. But he is not the kind of person to want to hurt anybody,” Magdalena Moczyk said on the GoFundMe page.

“All he wanted to do was show what he could do and make his team proud.”

Promoter Aurelijus Keree, who had organized the event, was said to be “deeply saddened” by the tragedy.

On the GoFundMe page, which hasn’t been updated since news of his passing, Magdalena Moczyk tells of the anguish of watching her brother, who is older by five minutes, fight for his life.

“He is continuously fighting, his heart beats and even though his eyes are shut, they’re tearing up and he cries with us. I know he can hear us whenever I speak to him.”

The fight was contested without headgear, as evidenced by photos shared on Facebook. The BBC reports that Norfolk Police will not be investigating the incident.