Dib's first professional fight was against Chad Roy Naidu in August 2004, as an 18-year-old. He won, and subsequently went on to win the next 20 bouts, not losing until October 2008, against
Steven Luevano.
WBO featherweight title challenge Billy Dib fought against Steven Luevano, the WBO featherweight champion, on 18 October 2008. He was unsuccessful, losing to Luevano in a unanimous points decision. After the match Dib announced that he would come back as a better boxer, stating that he would learn from the experience.
Return after first loss On Wednesday, 11 March 2009, at the Campbelltown Cube in Sydney, Dib returned to the ring in a spectacular performance, beating 22-year-old local Campbelltown fighter undefeated
Davey Browne Jnr via an 8th round technical decision after Browne was cut above both eyes. The first cut opened after an accidental head clash, while the second came from a clean punch. The fight was stopped on the first cut and went to the scorecards. On 9 July 2009, Billy Dib and Kenichi Yamaguchi were the main event on
One HD's first Superboxer promotion. After being knocked down during the opening stages of the first round, Dib rallied late in the piece to down Yamaguchi. While Yamaguchi was on his knees, Dib hit him with a late left-handed punch, and although Yamaguchi returned to his feet, he appeared unsteady, leading the referee to stop the fight at 2:59 seconds of the first round in Dib's favour. As Yamaguchi protested the call to the referee Dib without reason shoved Yamaguchi as well as his trainer sparking a small brawl between the two corners. and at their monthly board meeting on 4 August, the officials determined to change the result to a no-contest.
IBF featherweight champion After nine straight victories, in July 2011 Dib took on longtime contender
Jorge Lacierva and captured the IBF Featherweight belt via Unanimous Decision. Occasionally getting involved in a few lively and engaging exchange, for the most part he boxed a disciplined fight, out-boxing his smaller opponent. On 19 November 2011, Billy made the first defense of his title, knocking out Italian challenger Alberto Servidei in 2:38 of the first round from a left hook to the body. Dib made his second title defense against
Eduardo Escobedo on 7 March 2012 in retaining his title with a seventh-round TKO, his aggressive body attack broke down Escobedo who did not come out for round seven. He lost the title to
Evgeny Gradovich on 1 March 2013. A rematch between the two was scheduled for 23 November 2013, when
Evgeny Gradovich won by TKO in the 9th round.
Dib vs. Farmer On 3 August 2018, Dib fought Tevin Farmer for the vacant IBF super featherweight championship. Farmer was ranked #4 by the IBF at the time. Farmer dominated Dib and dropped him once en route to a convincing unanimous decision win, 120–107, 119-108 and 118–109.
Dib vs. Khan After a brief retirement following a loss to
Tevin Farmer in 2018, Dib returned to the ring in August 2019, losing in a
WBC welterweight title fight to
Amir Khan. Dib lost via a fourth-round TKO. Khan was ranked #15 by the WBC at welterweight. He has fought three times since his come back, twice in 2019, once in 2021. ==Professional boxing record==