British number one Andy Murray will feature in the Rally for Bally event in the summer in honour of retired tennis star Elena Baltacha.
The event was created after the 30-year-old announced in March that she has been diagnosed with liver cancer.
Murray, who clinched his first Wimbledon title last summer, will be joined by former British number one Tim Henman and 18-time Grand Slam champion Martina Navratilova, as well as a number of other stars, in mixed doubles matches.
The contests will be played on the finals day at the AEGON Championships at Queen's, the AEGON Classic at Birmingham and Eastbourne, with funds being split between the Royal Marsden Cancer Charity and the Elena Baltacha Academy of Tennis.