Videos IAAF World Athletics C'ships: Muhammad breaks 400m hurdles world record in Doha Dalilah Muhammad secured a world-record-breaking victory in the women's 400m hurdles, which she ran in 52.16 seconds at the Khalifa Stadium in Doha. Team Sportstar 05 October, 2019 11:10 IST Team Sportstar 05 October, 2019 11:10 IST Karate at the Tokyo Olympics: How it works Olympics records: Male and female athletes with most Olympic gold medals Tokyo Olympics: Not just COVID-19; quake simulations prepare visitors for natural disasters 'You did us proud': London mural celebrates England team Read more stories on Videos. More Videos Watch: Gareth Southgate calls racist abuse of England players 'unforgivable' Mithali Raj: Records revisited Dedicated to Zeus: A history of the Olympic Games Skater Lilly Stoephasius, the youngest German woman at Tokyo Olympics Skateboarding at the Olympics: how it works Row to Tokyo: Qatar's lone woman rower defying expectations Sneak peek: 2020 Tokyo Olympics athletes village Meet siblings Troy and Jayla Pina - first swimmers to represent Cape Verde at the Olympics