Undefeated women’s bantamweight contender Ketlen Vieira (10-0 MMA, 4-0 UFC) has been forced to withdraw from a planned appearance at next month’s UFC Fight Night 137 event.

The promotion is now seeking a replacement opponent for Tonya Evinger (19-6 MMA, 0-1 UFC), MMAjunkie today learned from a person with knowledge of the search who requested anonymity because promotion officials haven’t formally revealed the withdrawal.

The person also indicated the promotion is hoping for a Brazilian replacement due to the difficulty of securing travel visas on short notice but is open to all options.

Featuring a headlining bout of Jimi Manuwa vs. Thiago “Marreta” santos, UFC Fight Night 137 takes place Sept. 22 at Ibirapuera Gymnasium in Sao Paulo.

Evinger, a women’s MMA pioneer and former Invicta FC bantamweight champion looks to fight for the first time since her UFC debut, a July 2017 loss to Cris Cyborg in a failed bid for the UFC women’s featherweight title. Evinger hoped to return earlier this year, but a knee injury forced her to the sidelines until now.

Meanwhile, a timetable wasn’t immediately available for Vieira’s return.

With Vieira’s withdrawal, UFC Fight Night 137 now includes:

Jimi Manuwa vs. Thiago “Marreta” Santos Tonya Evinger vs. opponent TBA Sam Alvey vs. Antonio Rogerio Nogueira Neil Magny vs. Alex Oliveira Antonio Carlos Junior vs. Elias Theodorou Evan Dunham vs. Francisco Trinaldo Luis Henrique vs. Ryan Spann Renan Barao vs. Andre Ewell Sergio Moraes vs. Ben Saunders Thales Leites vs. Hector Lombard Belal Muhammad vs. Elizeu Zaleski dos Santos Alex Chambers vs. Livia Renata Souza

For more on UFC Fight Night 137, check out the UFC Rumors section of the site.