Sports Sydney McLaughlin sets world record; Dalilah Muhammad wins silver in 400 hurdles August 3, 2021August 4, 2021Tom Schad, USA TODAYComments Off on Sydney McLaughlin sets world record; Dalilah Muhammad wins silver in 400 hurdles The 21-year-old McLaughlin won the women's 400-meter hurdles in dominant fashion, beating compatriot Dalilah Muhammad in a world record 51.46 seconds.