Jacobs is 50% White Italian ( his mother is Italian) so give him some credit for that ... until last year he was essentially a long jumper and a leg injury was the cause if him changing to 100m.
Su time of 9.83 is a joke. Chinese state doping is 100% real like All communist states in the world...
Norway's Karsten Warholm breaks men's 400m hurdles world record
https://edition.cnn.com/2021/07/02/sport/karsten-warholm-breaks-world-record-spt-intl/index.html
Silver Metal for Daphne.
She injured herself before even arriving to the Rio OG . So her performace was less that expected during the games.
http://www.reuters.com/article/us-olympics-rio-athletics-schippers-idUSKCN10P0JY