European champion Audrey Werro nearly broke the 800m world record in Zurich, finishing just four tenths of a second behind the mark. The Swiss runner clocked 1:53.70, the third-fastest time in history. Despite the miss, Werro's performance shows her potential to break the record soon.

Werro was cheered on by a 25,000-strong crowd, running almost in stride with the pacing lights set for a world record. She overtook Femke Broeders-Bol in the final stretch but couldn't match the pace needed to beat the record. Werro remains optimistic about her future performances. Read more racing coverage.

Two new world records were set in Zurich. Brazil's Alison dos Santos broke the 400m hurdles record with a time of 45.80 seconds, while American Masai Russell set a new 100m hurdles record of 12.09 seconds. These achievements highlight the high level of competition in the event. Related: Masai Russell sets new 100m hurdles world record in Zurich.

This original Runner World brief is based on reporting from BBC Sport Athletics. Visit the source for its complete reporting, context and any later corrections.