On August 26, 2023, a 34-year-old Zhan Kossobutskiy (19-0, 18 KOs) and a 29-year-old Nigerian boxer Efe Ajagba (17-1, 13 KOs) met in the ring in a heavyweight bout.
Kossobutskiy came in to the fight on a 19-fight win streak with a 94% KO rate, and was fighting after a gap of 9 months and 21 days. Ajagba was on a 2-fight win streak with a 72% KO rate, and fighting after a layoff of 7 months and 12 days.
Efe Ajagba defeated Zhan Kossobutskiy via disqualification in the 10-round heavyweight fight. Ajagba improves his record to 18-1, while Kossobutskiy adds a loss to his record at 19-1.