[1] Bogs turned professional shortly after the games and was active during the 1960s and 1970s, building up an unbeaten record of 53 wins and one draw.

He suffered his first defeat against the former world welterweight and middleweight champion Emile Griffith in a non-title fight in June 1970.

[2] Bogs won the European light-heavyweight title in 1968 when he stopped German champion Lothar Stengel in the first round of the bout.

Bogs later moved back up to the light-heavyweight division and notched wins over contenders Vicente Rondon and Mike Quarry.

He lost to John Conteh in a bid to regain the European light-heavyweight title, and retired from boxing in 1974.