Sifan Hassan and Hellen Obiri were dominant in different ways and the Americans struggled, but two made the final

Emmanuel Korir put his 400 speed to good use in a tactical 800 final as Clayton Murphy and Nijel Amos were last and second to last respectively.

Courtney Frerichs went for gold and was rewarded with silver as Peruth Chemutai of Uganda got the upset win and Emma Coburn was not a factor.

Katir was a 3:36/13:50 guy at the start of the year but could end it as Olympic champion. Or could Paul Chelimo win the US's first gold in this event since Bob Schul in 1964?

A day after the men produced a historically good 400h, the women did it as well. Gold #1 for McLaughlin as Dalilah Muhammad (51.58) crushed the old world record (51.90) and Femke Bol (52.03) came close.

Athing Mu delivered an American record gold medal performance on the biggest stage possible while fellow 19 year-old Keely Hodgkinson got silver and American Raevyn Rogers PRd for bronze.

What a race. Was that the greatest race in the history of track & field?

Some fairly big names struggled, one fell, and Yared Nuguse did not start.

We recap the semis of the men's 400, women's 200, and women's 400m hurdles.

The Kenyan men had won every steeple they competed in at the Olympics since man first walked on the moon. No longer.

12 hours after falling in her 1500m prelim on the final lap and still winning her heat, Sifan Hassan dispatched Hellen Obiri with ease on the final lap to get gold #1.

Jacobs, a converted long jumper who was born in El Paso, ran two European records in three hours, winning the final in 9.80 ahead of the USA's Fred Kerley (9.84) and Canada's Andre De Grasse (9.89).

Nijel Amos and Isaiah Jewet fell to the track but Clayton Murphy made the final.

Should Hassan pull off triple gold, it would automatically become the greatest accomplishment in the history of women's distance running. But with Faith Kipyegon, Gudaf Tsegay, Hellen Obiri, and Letesenbet Gidey standing in her way, she's no lock for gold in any event.

Ross let up at the line and missed out on the final auto spot in his heat by .03. China’s Lijiao Gong won the women’s shot put as the USA’s Raven Saunders & New Zealand’s Valerie Adams took silver & bronze.

• Official women's steeple dicussion prelim thread
• Randolph Ross: Why Didn’t He Try for Third?
• Women's Shot Put Final

Athing Mu is your gold medal favorite and American great Ajee Wilson did not make the Olympic 800m final.

Most of the major favorites advanced to the semifinals including all 3 Americans led by an impressive Clayton Murphy. The stellar women's 400m hurdles also got underway.