On May 12, 2024, 30-year-old George Kambosos Jr. (21-2, 10 KOs) and 36-year-old Vasyl Lomachenko (17-3, 11 KOs) fought for the vacant IBF lightweight title.
Kambosos Jr. came in to the fight on a 1-fight win streak with a 43% KO rate, and was fighting after a gap of 9 months and 20 days. Lomachenko was on a -1-fight win streak with a 55% KO rate, and fighting after a layoff of 11 months and 22 days.
Vasyl Lomachenko stopped George Kambosos Jr. via TKO in the 11th round of the 12-round world-title fight. Lomachenko improves his record to 18-3 (12 KOs), while Kambosos Jr. adds a loss to his record at 21-3.
On October 16, 2022, George Kambosos Jr. and Devin Haney met again in an immediate rematch.
Kambosos Jr. came in to the fight on a 1-fight losing streak with a 47% KO rate, and was fighting after a gap of 4 months and 11 days. Haney was on a 28-fight win streak with a 53% KO rate, and fighting after a layoff of 4 months and 11 days.
Devin Haney defeated George Kambosos Jr. via unanimous decision in the rematch and successfully defended his WBA (Super), WBC, IBF, WBO, and The Ring lightweight titles. Haney improves his record to 29-0, while Kambosos Jr. adds a loss to his record at 20-2.
On June 5, 2022, the 28-year-old WBA (Super), IBF, WBO, and The Ring lightweight world champion, George Kambosos Jr. (20-0, 10 KOs), faced a 23-year-old American boxer Devin Haney (27-0, 15 KOs), in a title defense fight.
Kambosos Jr. came in to the fight on a 20-fight win streak with a 50% KO rate, and was fighting after a gap of 6 months and 9 days. Haney was on a 27-fight win streak with a 55% KO rate, and fighting after a layoff of 6 months and 1 day.
Devin Haney defeated George Kambosos Jr. via unanimous decision and wins the WBA (Super), IBF, WBO, and The Ring lightweight world champion — and becomes the undisputed lightweight world champion. Haney improves his record to 28-0, while Kambosos Jr. adds a loss to his record at 20-1.