Kate Middleton hit the tennis court with Emma Raducanu to celebrate the 18-year-old's stunning US Open win

• British Tennis star Emma Raducanu played tennis with Kate Middleton on Friday in London.
• The pair played in a doubles match at the Lawn Tennis Association's National Tennis Center.
• Their match comes weeks after Raducanu stunned the tennis world with her US Open win.

Kate Middleton joined tennis star Emma Raducanu to play tennis on Friday to celebrate the 18-year-old's debut grand slam victory at the US Open.

The pair played as doubles partners for a match at the Lawn Tennis Association's National Tennis Center in London.

After the match, Raducanu told reporters that Kate Middleton's "forehand is incredible,"according to People.

The Duchess of Cambridge, who is an LTA patron, also met with teen athletes while she was the facility, to encourage tennis among players of diverse backgrounds.

"Her Royal Highness is passionate about supporting grassroots tennis and encouraging young people from all backgrounds to become involved in the sport," Kate Middleton's office told People.

Raducanu stunned the tennis world earlier this month when she won the US Open after entering the tournament ranked 150th in the world.

The British tennis star has since split with coach Andrew Richardson and is looking for a new coach.

"I feel like at this stage in my career, and playing the top players in the world, I realized I really need someone right now that has had that WTA Tour experience at the high levels, which means that I'm looking for someone who has been at that level and knows what it takes," she told reporters, according to CNN. "And especially right now because I'm so new to it, I really need someone to guide me who's already been through that."