Overview

• After his May 3 rematch victory over Bruno Surace, Munguia's A-sample tested positive for exogenous testosterone metabolites, a result he has publicly disputed.
• He has a 10-day window to request analysis of his B-sample to confirm the initial finding.
• A confirmed positive B-sample could lead to a suspension and a change of the rematch decision to a no-contest.
• Bruno Surace has demanded that the result be overturned immediately, citing concerns about safety and fair competition.
• The case has intensified scrutiny of trainer Eddy Reynoso's camp after previous doping controversies involving Canelo Alvarez and Oscar Valdez.