I'm going to make a bold prediction and say that Sherika Jackson will spoilt the party in Tokyo and be a major threat for the 100M sprint title... she's normally a 400M runner who has already won bronze medals at both the last World Champs and Olympics, but her coach has recently made her switch focus to the sprints and her improvement over the season has been exceptional.
She ran a personal best of 10.77 in the semi-finals at the Jamaica National championships a few days ago. See the race in the video below.
With the rate she has been improving, added with her incredible form and strength I'll put a bet on her upsetting the field and beating a few of the favourites in the 100M sprint in Tokyo.
How much are you willing to lose?