Invicta FC 51: Tennant vs. Bernardo was a mixed martial arts event headlined by Taneisha Tennant defending her bantamweight championship against Talita Bernardo. The co-main event will see Kristina Williams and Ketlen Souza face off for the vacant flyweight championship. The night before the event, the fight between Tanya Nijjar and Sayury Canon was removed from the card after Nijar missed weight. Serena DeJesus came in at 137.3 pounds, 1.3 pounds over the limit and was fined 25% of her purse which went to Rubin.