British tennis star Katie Boulter has teamed up with American Express to design a collection of tennis themed charms.

Boulter, who recently played at Wimbledon, commented 'I've always embraced Tenniscore in my wardrobe, finding ways to reflect my love for the game. That's why I'm so excited to be working with American Express this year… It's the perfect way to mark these special two weeks of the year in true Wimbledon style'.