Joe Calzaghe last night confirmed he was quitting because he wants to retire as Britainâ€™s only undefeated world champion.
Calzaghe, 36, claims he has â€œno more mountains left to climbâ€œ after fulfilling all his ambitions in the ring.
â€œDeciding to call it a day has been one of the toughest decisions of my life,â€ said the Welshman.
â€œThereâ€™s always the temptation to fight on, especially if you are the champ and no-one has ever beaten you.
â€œBut Iâ€™ve now come to a point where the satisfaction of retiring undefeated has to outweigh the thrill of another fight.
â€œIâ€™ve also achieved every goal Iâ€™ve ever set myself in the ring. There are no more mountains left to climb.â€
Calzaghe ruled the super-middleweight division for over a decade before he stepped up to light-heavyweight last year to become a two-weight world champion.
During his glittering 16-year pro career, he beat all comers to chalk up his perfect 46-0 and record and his victories over Jeff Lacy, Mikkel Kessler and Bernard Hopkins have gone down in boxing folklore.