Nicco Montano, the former flyweight titleholder, was stripped of the belt at UFC 228 when she failed to make weight.
Jedrzejczyk, 31, bounced back from two consecutive losses to Rose Namajunas, the current strawweight champ, with a convincing decision win over Tecia Torres at UFC on FOX 30 in July.
— Joanna Jedrzejczyk (@joannamma) August 31, 2018
Shevchenko, 30, was supposed to face Montano for the belt at UFC 228. She has beaten Jedrzejczyk thrice in kickboxing bouts. After losing a close split-decision to bantamweight champion Amanda Nunes, she dropped down to 125 pounds and decisioned Priscilla Cachoeira at UFC Fight Night 125 in February.
— Valentina Shevchenko (@BulletValentina) September 20, 2018
UFC 231 is set for Dec. 8 at the Scotiabank Arena in Toronto.
Joanna Jedrzejczyk (14-2-0) vs. Valentina Shevchenko (15-3-0)
Chad Laprise (13-3-0) vs. Dhiego Lima (12-7-0)
Devin Clark (9-2-0) vs. Aleksandar Rakic (10-1-0)
Randa Markos (8-6-0) vs. Marina Rodriguez (10-0-0)
Hakeem Dawodu (8-1-1) vs. Kyle Bochniak (8-3-0)
Claudia Gadelha (16-3-0) vs. Nina Ansaroff (9-5-0)
Antonio Carlos Junior (10-2-0, 1NC) vs. Elia Theodorou (15-2-0)
Olivier Aubin-Mercier (11-3-0) vs. Gilbert Burns (13-3-0)
Max Holloway (19-3-0) vs. Brian Ortega (14-0-0, 1NC)
More bouts are expected to be announced.