Faith Kipyegon opens her season at the Prefontaine Classic in Eugene, Ore. On Friday, she will compete in the women's mile.
What's at stake?
The women's mile is hosting the world's top-ranked athletes, led by Jessica Hull, Faith Kipyegon, and Georgia Hunter-Bell.
Kipyegon's record of 4:07.64 could be under threat if the pace is aggressive from the gun.
Records to fall?
The Pre Classic is a two-day meeting with both Diamond League disciplines and non-discipline events.
Athletes will obtain scores that contribute towards the end-of-season championships and receive larger cash prizes for racing.
Canadian contingent
The Stafford sisters are making their first appearance since the national championships in two intriguing races.
Lucia Stafford will be chasing the elusive sub-4 barrier after running a PB of 4:00.83 in May.
Gabriela DeBues-Stafford is making her Diamond League season debut in the women's two-mile against a wide-open field.
She could be in contention for a podium finish on Saturday.
The men's 110m hurdles could produce another record-breaking performance this season.
Ja'Kobe Tharp of the U.S. will race for the first time since breaking the world record in June.
He faces a loaded field that includes compatriots Jamal Britt and Cordell Tinch.
Moh Ahmed will take on a world-class field in the men's two-mile.
The event has attracted one of the strongest distance fields of the season.
Grant Fisher arrives after winning the Diamond League 5,000m at the Meeting de Paris on Saturday.