What happened: The unbeaten flyweights will meet in Shanghai to open the main card. Hasan earned his UFC contract with a 45-second stoppage on Aug. 11.
Why it matters: Hasan has tied his performance style to his longtime admiration for Jackson and plans a special walkout. The booking gives him an 18-day turnaround from his contract-winning bout.
By the numbers: Hasan is 9-0 with seven knockouts, one submission and four first-round finishes. Rojas also enters at 9-0.
What to watch: Hasan and Rojas meet Saturday at UFC Shanghai, with the main card starting at 6 a.m. EDT.