An intriguing women’s bantamweight clash has fallen through one week out.

Marion Reneau (9-5-1 MMA, 5-4-1 UFC) has been forced to withdraw from a planned bout with Irene Aldana, MMA Junkie today learned from a person familiar with the matter but not authorized to discuss it publicly.

The two were set to meet at UFC on ESPN+ 17, which takes place Sept. 21 at Mexico City Arena in Mexico.

A replacement opponent has yet to be named, though Brazil’s Ag. Fight reported that Vanessa Melo (10-5 MMA, 0-0 UFC) will take the spot. Meanwhile, a timetable for Reneau’s return to action was not immediately available.

Hailing from Mexico, Aldana (10-5 MMA, 3-3 UFC) is currently ranked No. 14 in the latest USA TODAY Sports/MMA Junkie MMA women’s bantamweight rankings. The striking specialist is in need of a win after dropping back-to-back outings against Yana Kunitskaya and Cat Zingano.

The UFC on ESPN+ 17 lineup currently includes:

MAIN CARD (ESPN+, 8 p.m. ET)

Yair Rodriguez vs. Jeremy Stephens

Carla Esparza vs. Alexa Grasso

Askar Askarov vs. Brandon Moreno

Irene Aldana vs. opponent TBA

Martin Bravo vs. Steven Peterson

PRELIMINARY CARD (ESPN+, 5 p.m. ET)