She won this race yesterday in 51.12. Running the last 100 meters in what?Obliterating the rest of the field. Also, she's running so effortless...if she was jogging the first 300m, sub 49 isn't out of her reach this year. Who's she? Who's her coach?
Her final speed is superior than the likes of Tonique Williams Darling, Christine Ohuruogu, etc.
Also she ran XC in 2017 (18:30 for a short 4,6k circuit). Probably without proper training.
Apparently, she's 22 years old, and new in the sport, starting to train seriously 2 years ago, losing only one 400m race.
Here's another video, this time running 50 seconds, last year
Niger