Introducing Holger Rune, published author.

As part of his off-season traveling from one time zone to another, Rune briefly returned home to Denmark for a book signing of his new books at local bookstore Bog & idé.

Holger Rune – On and Off the Court and children’s book Where is Holger Rune in a World of Tennis takes readers on a journey of the 21-year-old’s professional tennis career.

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“Both books tell about Holger Rune's own path from childhood dream to one of the world's best tennis players, and both books also provide simple step-by-step guides to life as a tennis player,” writes Rune on Instagram.

The books were first released in September, just after the US Open. They include pictures, anecdotes, tips and tricks—and a look into Rune’s personal tennis bag, so that young players can see the smallest details of what it means to compete professionally.

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“It has been important to me that readers can feel my deep love for tennis and that the books are both entertaining, visually appealing, and educational,” wrote Rune on Instagram.

“Tennis is my greatest passion, and I am very aware of everything the sport has taught me and all the fantastic experiences it has given me. My hope is that the books will bring the same joy and inspiration to everyone who reads them, and that together we can share the passion for tennis 🎾… Whether it’s on or off the court.”