Easy Big Q for Dumas🔥🔥 🇺🇸 Natalie Dumas runs 58.86 in the last heat of the women's 400m hurdles prelims to advance to the semis. Fellow American Tatum Lynn qualifies as well with a 59.94-second performance in Heat 5. 🇦🇪 Mariam Kareem runs 57.87 to lead all qualifiers to the semifinals, followed by 🇩🇪 Rebekka Feirle and 🇷🇴 Alexandra Stefania Utǎ. 📸: @keithwebbersports