Now I go into my races much more open, and that makes it all different."
She described her exceptionally fast time as "bizarre."
In the men's 800-meter, Niels Laros also finished second with a time of 1:43.60, behind Canadian Marco Arop (1:41.84).
Laros lowered his personal best by 0.23 seconds, approaching the Dutch national record of 1:43.45 set by Bram Som in 2006.
In field events, Dutch shot putter Jessica Schilder placed third with a throw of 19.88 meters, as Canada's Sarah Mitton won with 19.99 meters and Germany's Yemisi Mabry took second at 19.93 meters.
Lieke Klaver finished fourth in the women's 400-meter sprint with a time of 49.97 seconds, breaking the 50-second barrier for the first time in two years.
>>> Paddleboarder Dies After Falling into Paterswoldsemeer Lake
The 400-meter race was won by Marileidy Paulino of the Dominican Republic, who set a world-leading seasonal time and a Diamond League record of 48.48 seconds.
