Sydney McLaughlin-Levrone powered though the final curve of the 400-meter final at the world championships, she glanced to her right and saw something that hadn’t been there in a while.

Soon after his departure, the legendary track coach received the phone call he knew would be coming — his prized protégé, Sydney McLaughlin-Levrone, the 400-meter hurdler who's now mixing in the 400,...

McLaughlin-Levrone struggled on the final metres as she clocked 47.78 seconds for gold, and defending and Olympic champion Marileidy Paulino of the Dominican Republic also dipped below 48 seconds wit...