Devin Haney outclasses Kambosos once more to retain unified lightweight title

• Haney beats Kambosos again to retain undisputed title at 135lbs
• American improves to 29 wins in 29 fights with 15 knockouts

American Devin Haney remains the undisputed lightweight boxing champion after outclassing former titleholder George Kambosos Jr yet again in Melbourne.

Despite sustaining a cut on the right side of his face during the eighth round, the 23-year-old Haney was dominant on Sunday while claiming a unanimous points decision over the Australian.