be in action

"I'm a hands on learner. I prefer to be in action than sitting in the classroom."

Novak Djokovic will be in action later on Saturday, against 20-year-old American Alex Michelsen, as the four-time Shanghai Masters winner aims for his 100th tour-level title.

The opening day of action features the grand prix tests with debutant Mari Durward-Akhurst going in the Grade I event while Georgia Wilson will be in action in Grade II and Natasha Baker in Grade III.

Before then, Great Britain's gold medal hope Keely Hodgkinson, Tokyo fourth-place finisher Jemma Reekie and teenage sensation Pheobe Gill will each be in action in the women's 800m heats from 18:45 BST.

Great Britain's gold medal hope Keely Hodgkinson, Tokyo fourth-place finisher Jemma Reekie and teenage sensation Pheobe Gill will each be in action in the women's 800m heats from 18:45 BST.