The Arena (Italian: La rivolta delle gladiatrici, lit. "The revolt of the gladiatrices"), also known as Naked Warriors, is a 1974 gladiator exploitation film directed by Steve Carver and starring Margaret Markov and Pam Grier. Joe D'Amato, the film's cinematographer, has stated that he took over direction of the fight scenes in the film.

Pam Grier and Margaret Markov portray female gladiators in ancient Rome, who have been enslaved and must fight for their freedom. This marks the second teaming of Grier and Markov; in 1972 they had starred together in the women in prison film Black Mama, White Mama.