Who Would Win in a Fight: An Average 22-Year-Old Young Adult Female vs. an Average 30-Year-Old Middle-Aged Man?

Assuming both are average, healthy individuals with no combat sports training, who do you think would win in a physical fight, and why?

For this discussion, the woman is a 22-year-old young adult, and the man is a 30-year-old middle-aged man. Both are of average height, weight, fitness level, and have no weapons or outside assistance.