The Middleweight World Championship Series was a boxing round-robin tournament staged by Don King Productions. The goal of the series was to produce a unified Middleweight boxing champion. The victor took the WBA, IBF and WBC 160-pound belts home, and became the first undisputed middleweight king since Marvellous Marvin Hagler

Marvin Hagler

Marvelous Marvin Hagler , is a former professional boxer who was undisputed world middleweight champion between 1980 and 1987. Hagler holds the distinction of having the highest KO% of all middleweight champions at 78%...

 held the distinction from 1979 until 1987. The victor was also awarded a specially commissioned "Sugar" Ray Robinson trophy.
The contenders in the tournament were William Joppy

William Joppy

William Torelle Joppy is an American middleweight boxer. Joppy held the WBA middleweight title on two occasions. He first became the WBA champion in June 1996 by stopping defender Shinji Takehara in Japan with a flurry of punches in the ninth round. He then would make a couple defenses of his crown...

, Keith Holmes, Bernard Hopkins

Bernard Hopkins

Bernard Hopkins Jr, known as The Executioner is an American boxer and the current Ring Magazine and WBC light heavyweight champion...

, and Félix Trinidad

Félix Trinidad

Félix 'Tito' Trinidad, Jr. is a Puerto Rican professional boxer, considered one of the best in Puerto Rico's history. After winning five National Amateur Championships in Puerto Rico, he debuted as a professional when he was 17. He won his first world championship when he defeated Maurice Blocker...

.
In the semifinal, Trinidad beat Joppy, and Hopkins beat Holmes.
The finale pitted Trinidad against Hopkins on September 29, 2001 in Madison Square Garden. Hopkins was victorious in 12th Round TKO.http://www.nyc.gov/html/sports/html/msg_boxing7.html.