Sign up for ESPN+ right here, and you can then stream UFC 266 live on your smart TV, computer, phone, tablet or streaming device via the ESPN app. Alexander Volkanovski will defend his undisputed Ultimate Fighting Championship featherweight title against Brian Ortega in the UFC 266 headliner on Saturday at T-Mobile Arena in Las Vegas. While they have yet to meet in battle, champion and challenger have the kind of familiarity that breeds contempt: They coached opposite one another on the recently completed 29th season of “The Ultimate Fighter” reality series.
They spent months in a proxy war with each other. Now comes the true test.