Ataja makes a 51 look easy in the semis 👀 🇺🇸 Ataja Stephane-Vazquez runs 51.76 to lead all qualifiers in the semifinals of the women's 400m at #WorldAthleticsU20, and Clara Adams makes it through as well. 🇵🇱 Anastazja Kus and 🇬🇾 Tianna Springer win Heats 1 and 3, respectively. This is the field for the final: 🇺🇸 Ataja Stephane-Vazquez 🇵🇱 Anastazja Kuś 🇬🇾 Tianna Springer 🇺🇸 Clara Adams 🇸🇰 Lenka Gymerská 🇸🇮 Maša Medjimurec 🇧🇧 Kadia Rock 🇦🇺 Alice Hill 🇬🇧 Casey Musgrave 📸: @keithwebbersports