Faith Kipyegon bounced back from a disappointing mile race to shatter her 1500m world record, finishing in 3 minutes 48.68 seconds, breaking her previous record by 0.36 seconds.
"Once the world realizes that, I think everyone is going to want it. Every middle-aged guy who once played competitive sport and is now suffering from back pain is going to say, 'What is he on and how do I get it?'"