The Tokyo Olympics takes place from 23 July to 8 August 2021 and it will be worth the five year wait. Dinah Asher-Smith carries many of Team GB’s hopes on the track as she tries to add gold medals in the 100m and 200m to the titles she won at the World Championships. The greatest athletes on earth will descend on the Japanese capital and there will be fascinating events in the water, on the field and beyond during the most famous fortnight in sport. Betting.Betfair is the place for the best previews and tips during the Tokyo Olympics.