Alex Oliveira will have to go under the knife.

“Cowboy" suffered the first TKO loss of his MMA career on Dec. 2, losing a UFC 218 “Fight of the Night” to Yancy Medeiros in Detroit. He was informed by his doctor that the nose injury he suffered in the fight requires surgery.

Oliveira will undergo surgery Thursday in Tres Rios, Brazil, MMA Fighting has learned.

The defeat snapped Oliveira’s five-fight unbeaten streak, which included stoppage victories over Ryan LaFlare, Tim Means and Will Brooks. "Cowboy" should be cleared to train full contact in a month.

Update: Oliveira's coach Andre Tadeu told MMA Fighting that the UFC fighter underwent surgery on Thursday afternoon, and his doctor deemed it a success.