59.7/57!! 1:55 is surely on the way. This will be a huge challenge for Ajee' Wilson to beat Mu. Gold medal is surely on the way. Once Mu ran that incredible 600m indoors at 16 (1:23.57, #2 all-time world indoor), you knew this was a great one. Taller than the rest of the field by far, thin, not muscular, no indication or need for drugs whatsoever, but ....
indoors
1 1:23.44 Olga Kotlyarova RUS 12.04.76 1r2 Moskva 01.02.2004
2 1:23.57 Athing Mu USA 08.06.02 1 New York City 24.02.2019
These are the only faster outdoor times:
1 1:21.77 Caster Semenya RSA 07.01.91 1 Berlin 27.08.2017
2 1:22.39 Ajee' Wilson USA 08.05.94 2 Berlin 27.08.2017
3 1:22.63A Ana Fidelia Quirot CUB 23.03.63 1 Guadalajara 25.07.1997
4 1:22.87 Maria Mutola MOZ 27.10.72 1 Naimette-Xhovémont 27.08.2002
5 1:23.13 Maria Mutola MOZ 27.10.72 1 Naimette-Xhovémont 02.09.2003
6 1:23.18 Francine Niyonsaba BDI 05.05.93 3 Berlin 27.08.2017
7 1:23.35 Pamela Jelimo KEN 15.12.89 1 Naimette-Xhovémont 05.07.2012
8 1:23.5A Doina Melinte ROU 27.12.56 1 Poiana Brasov 27.07.1986