Kessler was born to a Danish father and an English mother, Ann, who hails from Salisbury, Wiltshire. He began his vocation early, training in boxing gyms at age 13.
Kessler competed five years as an amateur (2/93-1/98). He finished his amateur career with a record of 44 wins and three losses. He won the 1995 European Cadet (15-16 age group) Championship, 1996 and 1997 Danish Junior Championships, the 1996 Nordic Amateur Championship, and in his last amateur bout won the 1998 Zealand International Tournament after stopping all 3 of his opponents.
Kessler originally campaigned as a light middleweight and then middleweight for the first 22 fights of his career. He won 16 of his first 22 fights by knockout (KO).
After 3 years and 22 fights, Kessler settled in the super middleweight division. Kessler continued his hard hitting streak, dispatching 6 of his first 7 opponents by KO, thereby improving his record to 29–0 with 22 KO.
On 29 November 2002, Kessler fought for his first championship and defeated former WBC Super Middleweight Champion Dingaan Thobela over twelve rounds to become the International Boxing Association Champion. He gave up this belt to fight for the more recognized WBC International title on 11 April 2003, versus Craig Cummings. Kessler won by a knockout in the third round.
He defended his title on three occasions before finally hitting it big on 12 November 2004. His stablemate, Mads Larsen, another Danish World Class fighter, was set to challenge Manny Siaca for the WBA Championship in Copenhagen. Larsen was injured in training and Kessler took the fight on short notice, winning the title.
Kessler defended his title against Anthony Mundine in Sydney in June 2005 and Eric Lucas in January 2006.On 14 October 2006, Kessler was elevated to WBA Super Champion status after winning the WBC title in a unification battle against WBC World Champion Markus Beyer at the Parken Stadium. He won by knockout at 2:58 in round 3.Kessler defended his WBA (Super) and WBC titles on 24 March 2007, at the Parken Stadium against WBC mandatory challenger Librado Andrade. The fight was scored as a shutout (120–108) by all three judges.
In 2012, Kessler moved up in weight class to light heavyweight. In May 2012, he fought Allan Green for the vacant WBC Silver Light Heavyweight title. Kessler won via knockout in the fourth round.
Late in 2012, Kessler went up against Brian Magee Northern Ireland for the WBA Supermiddle Weight Title. Two times in the 2nd round Brian Magee went to the floor after hard bodyshots from Kessler, and 24 seconds in the third round it was allover, when Kessler landed another hard bodyshot to Brian Magee.
Source: DSG
