The most prestigious prize in the atomweight division will be on the line when Invicta Fighting Championships visits the Grand Casino Hotel & Resort in Shawnee, Okla., on Friday, April 4, for Invicta FC 61: Ferreira vs. Palacios.

The event is headlined by the first title defense for Brazil's Elisandra "Lili" Ferreira (8-2), who matches up with Mexico's Ana "Guerrera" Palacios (10-3-1). The 26-year-old Ferreira has yet to taste defeat under the Invicta banner, reeling off four straight victories. In her most recent appearance, Ferreira bested countrywoman Andressa Romero over five rounds to capture 105-pound gold. Also taking the division by storm, Palacios has quickly established herself as the No. 1 contender with back-to-back victories against Monique Adriane and Flor Hernandez. Now she'll aim to dethrone Ferreira and claim the moniker of best atomweight on the planet.

In the co-main event, featherweights Jamie "Snickers" Edenden (5-2-1) and Jackie "The Hybrid" Cataline (5-3) are slated to collide yet again. The pair were originally slated to face off at Invicta FC 60, but a medical suspension pushed the pivotal 145-pound bout to April. Australia's Edenden was successful in her first Invicta appearance, besting Mexico's Abby Montes by decision in September. Meanwhile, the decorated wrestler Cataline impressed in her Invicta debut in August, handing previously undefeated Brazilian Kelly Ottoni her first loss.