McMaster, the defending champion, ran a new championship record of 47.34, a season-best time to take the title.

Close on his heels was the USA’s Khallifah Rosser, who clocked a lifetime-best of 47.59 for the silver medal. The USA’s CJ Allen was third in 48.22, the second fastest time of his career.

It was a Jamaica 1-2 in the women’s race in which Salmon, the Commonwealth Games silver medallist turned the tables on Commonwealth champion Janieve Russell.

Salmon pulled away over the final two hurdles to win in 54.22. Russell clocked 54.87 while the USA’s Cassandra Tate was third after crossing the finish line in 55.67.

It was also gold and silver for Jamaica in the men’s discus. Traves Smikle, the Commonwealth Games bronze medallist continued his dominance over his good friend and training partner Fedric Dacres.

Smikle’s winning mark was 62.89m, just 10cm farther than Dacres’ 62.79m.

Torres Mario Alberto Diaz of Cuba threw 62.13m for the bronze medal.