Mark Wetmore's two biggest stars will make their season debuts - Jenny Simpson (800) and Emma Coburn (1,500) - while Kara Goucher (5,000) will run her first track race since 2013 and Mary Cain will look to regain her "teen phenom" label.

A ton of solid US distance performances. Some highlights include Will Leer winning the main 1500 in 3:34.26, Emma Coburn 4:05.29 in the 1500, Kenya's Olympic bronze medalist Timothy Kitum won the 800 in 1:43.65 as Elijah Greer was 4th in 1:44.91, Nicole Bush set a 10-second PR to win the steeple in 9:24. In the 5000 Augustine Choge won in 13:06 as Lawi Lalang was 3rd (13:11) and Chris Derrick was 5th (13:14).  Asafa Powell made his return to race with 10.15 for 2nd in the 100 behind US's Marvin Bracy (10.13).