Americans Sydney McLaughlin-Levrone and Melissa Jefferson-Wooden completed sweeps to join the list of Grand Slam Track champions and close the series' debut meet in Kingston, Jamaica.
McLaughlin-Levrone breezed through Sunday's 400m in 50.32 seconds in a windy National Stadium, pairing it with a 400m hurdles victory on Saturday to win the long hurdles group.
McLaughlin-Levrone, the two-time Olympic gold medalist and world record holder in the 400m hurdles, took the Kingston races by dominant margins — 1.77 and 1.83 seconds.
McLaughlin-Levrone is signed up for all four Grand Slam Track meets this season. Kingston is followed by Miami (May 2-4), Philadelphia (May 30-June 1) and Los Angeles (June 27-29), all live on Peacock.
GRAND SLAM TRACK: Full Results
Earlier Sunday, the Olympic 100m bronze medalist Jefferson-Wooden completed a sweep of the short sprints, adding the 200m (23.46 into a 4.7 meter/second headwind) to her 100m win from Saturday.
American Grant Fisher wrapped up the long distance Slam title with a third-place finish in the 3000m. Fisher, a two-time Olympic bronze medalist, earned the biggest international outdoor victory of his career in Saturday's 5000m.
In the 800m, Canadian Marco Arop ran away from Kenyan Emmanuel Wanyonyi in a reversal of their one-two from the Paris Olympics.
Arop clocked 1:45.13, while Wanyonyi (1:46.44) paired the runner-up with his 1500m win Saturday for the Kingston Slam short distance title.
