Formiga feared for a serious knee injury during the 125-pound bout on June 6, but told MMA Fighting on Wednesday that post-fight tests showed he only had leg contractures.
His right shoulder required a procedure, though.
“I ended up having shoulder surgery and will be sidelined for a bit,” Formiga said. “I also felt (the shoulder) in the fight. I hurt it in camp and ended up doing a MRI, and it showed an injury.”
Formiga expects to be sidelined from training for 8 to 10 weeks.
Perez, on the other hand, improved to 24-6 in the sport with six wins in seven UFC appearances.