Women’s MMA pioneer Jessica Aguilar has mixed feelings about her return to fighting, and it’s not toward the sport. The former WSOF champion and UFC and Bellator veteran fights Sunday in RIZIN FF’s women’s an atomweight grand prix . Aguilar (20-9) takes on the promotion’s former champion, Ayaka Hamasaki, in the opening round of the tournament. “It’s a bittersweet feeling,” Aguilar told reporters at RIZIN FF 37 media day on Friday