Here is a list of Calzaghe's best fights.
On March 4, 2006 Joe Calzaghe, the WBO champion, met Jeff Lacy, the IBF and The Ring champion, in a super-middleweight world-title unification fight. Calzaghe was 33 years old and with a record of 41-0 (31), and Lacy was 28 years old and with a record of 21-0 (17). Calzaghe won the fight via 12-round unanimous decision and and is crowned the unified WBO, IBF and The Ring champion.
On November 3, 2007 Joe Calzaghe, the WBO and The Ring champion, met Mikkel Kessler, the WBA (Super) and WBC champion, in a super-middleweight world-title unification fight. Calzaghe was 35 years old and with a record of 44-0 (32), and Kessler was 28 years old and with a record of 39-0 (29). Calzaghe won the fight via 12-round unanimous decision and and is crowned the unified WBO, The Ring, WBA (Super) and WBC champion.
On November 8, 2008 Joe Calzaghe met Roy Jones Jr. in a light-heavyweight (The Ring) world-title defense fight. Calzaghe was 36 years old and with a record of 46-0 (32), and Jones Jr. was 39 years old and with a record of 52-4 (38). Calzaghe won the fight via 12-round unanimous decision and successfully defended his title.
On October 11, 1997 Joe Calzaghe fought Chris Eubank in a super-middleweight world-title fight for the WBO title. Calzaghe was 25 years old and with a record of 23-0 (21), and Eubank was 31 years old and with a record of 45-2-2 (23). Calzaghe won the fight via 12-round unanimous decision and is crowned the new super-middleweight world champion.
On October 14, 2006 Joe Calzaghe met Sakio Bika in a super-middleweight (WBO, IBF and The Ring) world-title defense fight. Calzaghe was 34 years old and with a record of 42-0 (31), and Bika was 27 years old and with a record of 20-1-2 (14). Calzaghe won the fight via 12-round unanimous decision and successfully defended his titles.
On April 20, 2002 Joe Calzaghe met Charles Brewer in a super-middleweight (WBO) world-title defense fight. Calzaghe was 30 years old and with a record of 33-0 (27), and Brewer was 32 years old and with a record of 37-8 (26). Calzaghe won the fight via 12-round unanimous decision and successfully defended his title.
On April 19, 2008 Joe Calzaghe fought Bernard Hopkins in a light-heavyweight world-title fight for Hopkins' The Ring title. Calzaghe was 36 years old and with a record of 45-0 (32), and Hopkins was 43 years old and with a record of 48-4-1 (32). Calzaghe won the fight via 12-round split decision and is crowned the new light-heavyweight world champion.
On February 13, 1999 Joe Calzaghe met Robin Reid in a super-middleweight (WBO) world-title defense fight. Calzaghe was 26 years old and with a record of 26-0 (23), and Reid was 27 years old and with a record of 26-1-1 (19). Calzaghe won the fight via 12-round split decision and successfully defended his title.
On December 16, 2000 Joe Calzaghe met Richie Woodhall in a super-middleweight (WBO) world-title defense fight. Calzaghe was 28 years old and with a record of 30-0 (25), and Woodhall was 32 years old and with a record of 26-2 (16). Calzaghe stopped Richie Woodhall via 10th-round TKO and successfully defended his title.
On June 28, 2003 Joe Calzaghe met Byron Mitchell in a super-middleweight (WBO) world-title defense fight. Calzaghe was 31 years old and with a record of 36-0 (29), and Mitchell was 29 years old and with a record of 25-2-1 (18). Calzaghe stopped Byron Mitchell via 2nd-round TKO and successfully defended his title.