Suppose Julio César Chávez González (born July 12, 1962), also known as Julio César Chávez Sr., is a Mexican former professional boxer who competed from 1980 to 2005. He is considered by many to be one of the greatest boxers of all time. During his career, he won multiple world championships in three weight divisions. Chávez was known for his aggressive style, durability, and exceptional boxing skills.
Can we infer that "Julio César Chávez Sr. never lost a boxing match."? Yes, no, or maybe?