1. Jermall and Jermell Charlo
The careers of the Charlo brothers have almost run parallel since turning pro within nine months of each other. Jermell, a super-welterweight, is a former WBC champion dethroned by Tony Harrison in December, while Jermall is the current WBC middleweight champion.
2. Naoya and Takuma Inoue
Naoya is a world champion at light-flyweight, super-flyweight and now bantamweight, having dethroned Jamie McDonnell back in 2018. Takuma, on the other hand, is still making his way in the sport and last year won the WBC interim title at bantamweight, beating Tasana Salapat via decision.
3. Callum, Liam and Stephen Smith
The tally of active Smith brothers dropped from four to three when big brother Paul retired in 2017. Each Smith brother has won a British title and Callum and Liam have both held world titles.
4. Saul and Ramon Alvarez
Few siblings in boxing are as far apart, in terms of achievements and profile, as the Alvarez brothers from Mexico. Saul, known as ‘Canelo’, is arguably the biggest star in the sport, a world champion in three weight classes, while Ramon boasts a 28-7-3 pro record and is considered more of a dependable trial horse.
5. Anthony and Andre Dirrell
Talented super-middleweights Andre and Anthony Dirrell have both featured in their fair share of controversial fights. Andre won an IBF interim title after Jose Uzcategui was disqualified in 2017, and Anthony claimed his WBC belt when beating Sakio Bika in 2014 following an earlier draw against the Australian.
6. Jamie and Gavin McDonnell
After winning British, Commonwealth and European titles at bantamweight, Jamie added IBF and WBA world titles to his collection. Twin brother Gavin, meanwhile, won the British belt at super-bantamweight but then fell short in his first world title fight against Daniel Roman last October.
7. Jessie and Diego Magdaleno
Jessie was the WBO super-bantamweight champion before Isaac Dogboe dethroned him in dramatic fashion in 2018. Diego, meanwhile, has fallen short in WBO title shots at both super-featherweight and lightweight.
8. Deontay and Marsellos Wilder
Deontay is three years older than Marsellos and the current WBC heavyweight champion of the world. Marsellos, just starting out, has had only five fights as a pro but has already been stopped once (by William Deets earlier this year).
9. Kal and Gamal Yafai
Undefeated in 26 fights, Kal is the reigning WBA super-flyweight champion, with five successful defences to his name, while Gamal, his younger brother, saw his own unbeaten record snapped last year by Gavin McDonnell.
10. Charlie and Sunny Edwards
Sunny, without a defeat in 11 pro fights, hopes to one day emulate the success of big brother Charlie, who rebounded from a crushing loss to John Riel Casimero in 2017 to snatch the WBC flyweight title from Cristofer Rosales last December.