Kate Middleton is hitting the court with tennis pro Roger Federer for an important cause next month.

The Duchess of Cambridge, who is a huge tennis fan and patron of the All England Lawn Tennis and Croquet Club, which organizes Wimbledon, will team up with Federer in London, U.K. for charity, on behalf of the Laver Cup.

The pair will raise money for two causes close to Kate’s hearts — Action for Children and the LTA Foundation. The royal is patron of both.

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Children from East London, from ages 8-15, will also be given a chance to play alongside Federer, People reported, in a bid to encourage children from all backgrounds to get involved with the sport.

A charity Laver Cup Open Practice Day will then take place on September 22, which will see Team Europe and Team World battle it out.

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All proceeds raised from tickets to the O2 Arena event will be split between the above two charities.

Kate is a regular Wimbledon attendee, with her and Prince William taking their 9-year-old son Prince George along to the annual event earlier this year.