Former junior middleweight titleholder Jaime Munguia is facing a potential suspension and the overturning of his recent victory over Bruno Surace after testing positive for a banned substance. The positive result came from a postfight urinalysis conducted by the Voluntary Anti-Doping Association (VADA).

Munguia's team was notified on Wednesday night about the presence of exogenous testosterone metabolites in his Test A sample. They are now preparing to request the opening of Test B for further analysis. Munguia has a 10-day window to request this analysis, and if Test B also returns positive, his victory could be overturned to a no contest, and he could face a suspension ranging from six months to one year.

In a statement on social media, Munguia expressed his surprise at the VADA notification, stating that he had been tested twice during his training camp, both of which came back negative. He emphasized his willingness to undergo any additional testing to prove his innocence and maintain his status as a clean athlete.

Munguia's promoter, Golden Boy Promotions, has yet to respond to requests for comment from ESPN. This situation adds a layer of complexity to Munguia's career, especially following his wide decision win over Surace on the Riyadh Season card, which was headlined by Canelo Alvarez's victory over William Scull.

The boxing community is now watching closely to see how this situation unfolds, as it could have significant implications for Munguia's future in the sport.