Sydney McLaughlin followed her astonishing world record by taking the final victorious lap of the World Athletics Championships on Sunday, pulling away in the 4x400-metre relay to close a US runaway and give the Americans their record 33rd medal of the meet.
McLaughlin turned a 0.73-second lead into a 2.93-second laugher on the anchor lap, adding this burst of speed to the world record she set two nights earlier in the 400 hurdles and guiding her team to a winning time of three minutes, 17.79 seconds.
Two more world records were broken on the day – in the first and last action of the last session at Hayward Field in Eugene, Oregon.
Nigeria’s Tobi Amusan opened the evening by setting the record for the 100m hurdles in the semifinals with a time of 12.12 seconds.