be in action

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.

The Northern Irishman, who fell to world number three following Xander Schauffele's PGA Championship victory this month, did not play last week but will be in action in each of the next four tournaments, a run that includes the US Open at Pinehurst next month.