the belgian 4 × 400 m relay team, which included julien watrin, robin vanderbemden, 2018 junior world champion jonathan sacoor and younger brother dylan, reached the final with a win in heat 2 in 3:02.44s, the 4th fastest qualifying time. in the final julien watrin and robin vanderbemden were replaced by the twin brothers kevin and jonathan. the belgian team won gold in 2:59.47s.