Multiple sources confirmed the matchup to MMA Fighting with verbal agreements in place from the fighters.
For McMann, the fight will serve as her chance to return to the win column after suffering a submission loss to Julianna Pena in her last outing. The former Olympic silver medalist will also look for revenge after previously falling to Vieira by arm-triangle choke back in 2017.
Meanwhile, Vieira will also seek to get back on track after going 1-2 in her past three fights following a 10-0 start to her career. Vieira has fallen to Yana Kunitskaya and Irene Aldana while picking up a win against Sijara Eubanks in her most recent performances.
McMann vs. Vieira 2 is the first confirmed fight for the upcoming Aug. 28 card with more bouts expected to be announced in the coming weeks.