Informed sources close to the situation said about the organization of the middleweight bout.
Robert Brycek, 33, is riding a streak of four wins by knockout, having finished all of his opponents in the first round.
Albert Duraev, 34, has been steadily alternating wins and losses for the past two years, most recently losing by rear-naked choke in the second round to Yoon Yong Pak.
The main event of UFC Fight Night 236 will be a middleweight bout between Jack Hermansson and Joseph Peifer.