London, England -- (Sports Network) - Undefeated English star Joe Calzaghe and legendary fighter Roy Jones Jr. are reportedly set for a September 20 bout at New York City's Madison Square Garden, in what will likely be the final fight of Calzaghe's career.

According to the British newspaper The Telegraph, sources close to the 36- year-old Calzaghe's camp confirmed that the fight -- for Calzaghe's The Ring Magazine light-heavyweight title -- is "99 percent certain" to be hosted at the legendary venue.

Calzaghe, who boasts a 45-0 professional record and has owned the WBO super middleweight title since October 1997, surrendered his WBC super middleweight belt to take the match with Jones. He still holds the WBO and WBC titles at super middleweight, but moved up to light-heavyweight in April and defeated Bernard Hopkins by split decision.

Jones, 39, has been a champion in four different weight classes and previously held the light-heavyweight title for seven different organizations.

Calzaghe had stated publicly that he wanted to box once more at Millennium Stadium in Cardiff, Wales -- where he currently resides -- but according to the Telegraph, HBO, which will air the bout on pay-per-view, would only back the fight if it took place in the United States.