Novak Djokovic will be appearing at the Boodles tournament in Bucks for the tenth year running.
The world's best tennis player will prepare for the defence of his Wimbledon title at the Stoke Park tournament, which begins next week.
A number of the world's top 20 players will compete against Djokovic for the title, while there will also be a guest appearance from former SW19 winner Goran Ivanisevic.
John Isner - who famously beat Nicolas Mahut 70-68 at Wimbledon in the world's longest tennis match - Richard Gasquet, world number eight Milos Raonic and up-and-coming American Jack Sock will all be playing.
Boodles will take place from June 23-27 at Stoke Park.
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