Diego Arrua, the husband and trainer of former WBC interim featherweight champion Sabrina Maribel Perez, died on Friday night after suffering a heart attack during Perez’s title defense bout, according to multiple reports.
He was 58.
WBC president Mauricio Sulaiman confirmed the news of Arrua’s passing in a post on X, the company formerly known as Twitter, late Friday night.
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"It is with deep sadness that we have been informed of the sudden death of Argentine coach Diego Arrua, who suffered a devastating heart attack during the Sabrina Pérez fight in Tijuana," a translation of his post read.
"The medical services did everything possible and he died at the QDEP general hospital."
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Perez was defending her title against Australia’s Skye Nicolson when Arrua collapsed in the corner between rounds nine and 10, ESPN reported.
Matchroom Boxing, which prompted the fight, also posted a message on X.
"RIP Diego," it began. "Our thoughts and condolences are with Sabrina Perez and your loved ones."
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According to the report, Nicolson claimed the title after winning by unanimous decision.
"Victory overshadowed by tragic passing [of] Team Perez coach Diego Arrua during the fight," her manager, Paul Ready, posted on Instagram.
"Our wishes and prayers with them and their family."