Another perspective wrote:
I will point out that Sinclaire's first lap yesterday was 61.3. She went through in 62.0 in Pre when she ran 3:58.
Yesterday she ran 64.0s for the final lap while at Pre she closed in a 60.5.
Basically the main difference between her Prefontaine run and yesterday was she didn't have the same kick on the last lap as she did in Pre. Fair enough as Pre was on fresh legs while this was off of rounds.
Definitely needs a bit more aerobic strength to maintain speed through the rounds. With that close being compromised I doubt she medals even in a slower race.
Realistically the fields best chance was to ignore the leaders, run 62s and hope your 3:55 was going to be good enough. Seriously what can do you when your competitors are 4s faster than you are? Maybe 3 or 4 of you can make it slow and hope stuff happens but I am pretty sure the medalists all have faster 800s/400s.