Bolt beat Isiah Young by .03 but looked to have more in the tank while fellow Olympic champs Matthew Centrowitz and Asbel Kiprop struggled in the 1500. Hellen Obiri rocked the 3000 (8:23.14) as Wayde van Niekerk was pushed hard in the 400 by Botswana's Isaac Makwala.
Bolt says he's spent two weeks in Germany getting treatment for his back problem from Dr. "Healing Hans."
*CBC: Andre De Grasse's Coach Says They Were "Booted Out" Of The 100m By Usain Bolt De Grasse's coach Stuart McMillan: "We were in the [100] race. We got booted out. That's all on Bolt. Let's just say he wanted not such an elite field against him."
Bolt talks about London, retirement, soccer, whether he could have broken 19-seconds, and who he thinks the next 100m stars will be.