Play video content TMZSports.com Khabib NurmagomedovHenry CejudoKamaru Usman … three bonafide legends who happened to be managed by Ali Abdelaziz. But, forced to pick the best fighter he’s managed, Ali says it’s the “Nigerian Nightmare.” TMZ Sports talked to Abdelaziz days before his star client, 35-year-old Usman, takes on Leon Edwards in the main event