The USA was the dominant force at both men and women’s 4x400m Relays at the World Relays. However, in Yokohama, the team USA lost both races for the first time in the history of the IAAF World Relays.
In the men’s race, Trinidad and Tobago won first gold in the men’s 4x400m Relay at the World Relays. Previously they won bronze in 2014. The Jamaican team won first silver at 4x400mR at World Relays, improvement from a bronze medal they won in 2017. Belgium won second bronze at this event in the World Relays. Previously they won a bronze medal in 2015
The fourth place finish by Japanese team is the best finish by team from Asian at men’s 4x400m Relay in the history of the World Relays. Incidentally their finishing time, 3:03.24, is exactly the same as their time from 2014 when the team finished second in the “B” final.
The winning margin of 0.76 second is the largest winning margin for men’s 4x400m Relay at the World Relays. The time difference between first and third was 1.89 seconds, which is the largest ever for men’s 4x400m Relay at the IAAF World Relays.
Turning attention to the women’s race, the team from Poland won first gold in the women’s 4x400m Relay in the World Relays. They have won silver two years ago. The Italian team won first medal any kind at this event in the history of the World Relays.
The winning time for the women’s 4x400m Relay, 3:27.49, is the slowest winning time in the history of the IAAF World Relays. Both the winning margin of 0.16 seconds as well as the time difference between the first and third place, 0.25 second, are smallest in the history of the World Relays.