The Diamond League returns after a month-long break, starting with the Athletissima Lausanne meeting. Canadian Marco Arop headlines the men's 800m, holding the world lead of 1:41.84. Four other runners also have personal bests under 1:42, promising a competitive race.

Olympic champion Emmanuel Wanyonyi of Kenya and Algeria's Djamel Sedjati join Arop in the 800m. These athletes have shared podium spots at recent major events. Swiss Audrey Werro and Dutch Femke Broeders-Bol add to the field's depth. Read more racing coverage.

The women's 200m features Jamaica's Shericka Jackson, undefeated this year, and Great Britain's Amy Hunt, fresh off a triple-gold performance at the European Championships. The men's 200m includes Olympic champion Letsile Tebogo of Botswana and South Africa's Sinesipho Dambile, who won Commonwealth gold. Related: Great Britain Dominates European Athletics Championships.

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