According to multiple sources, the promotion is currently targeting Ferguson vs. Chiesa as the main event of the July 13 card in Sioux Falls, S.D. The UFC has yet to officially announce the fight because it has yet to be finalized.
Ferguson (20-3) has won his last seven fights in a row, most recently beating Edson Barboza in December. He was scheduled to fight Khabib Nurmagomedov in the main event of UFC on FOX 19 last month, however, Ferguson was forced to withdraw from the fight after experiencing fluid and blood in his lungs.
Chiesa (14-2) extended his current winning streak to three in a row last month when he submitted Beneil Dariush via rear-naked choke also at UFC on FOX 19. After the fight, Chiesa said he'd like to main event a show opposite Ferguson in his post-fight interview.
UFC Fight Night 91 will take place at the Denny Sanford Premier Center, and it will air live in the United States on FS1.