Veteran coach Michael Carr says the ceiling is high for newly crowned World Under-20 100m hurdles bronze medallist Tiana Marshall, and expects the talented teenager to achieve even greater success in the years to come.

Marshall, age 18, produced a strong performance at the World Under-20 Championships in Eugene, Oregon, last week, clocking a personal-equalling best of 12.97 seconds to secure the bronze medal.

American Madeline Cooper won the event in a World Under-20-leading 12.91, while South Africa’s Tumi Ramokgopa took silver in 12.96.