Novak Djokovic celebrates his 32nd birthday today by giving back.

The world No. 1 took to Twitter today announcing his plan to use his birthday as a fund-raiser to build a new pre-school in Serbia.

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"Like last year, I'm dedicating my birthday to the children of Serbia to build a pre-school," Djokovic said. "Thirty-second birthday, 32,000 Euros, that's what we're collecting. I invite you all to join the campaign and let's build this school together."

Come celebrate my birthday with @novakfoundation! Join us at the link in my bio to help build 1 more preschool this year 😃🥳 (Thank you for all the well wishes, let’s make the world a better place, together 🙏🏼) #BelieveinTheirDreams #NoleFam pic.twitter.com/SrdCV59a5a

— Novak Djokovic (@DjokerNole) May 22, 2019

One man can make a difference. But imagine the world we can build together! Join @DjokerNole birthday campaign and help us raise $32k for children in Serbia 🎉🙏❤️ https://t.co/WLCdu5ELU4

— Novak Djokovic Foundation (@novakfoundation) May 22, 2019

Federer by 32d birthday

17 Grand Slam singles titles. 21 Masters 1000 singles titles. 302 weeks No. 1

Nadal by 32d birthday

16 GS singles titles. 32 Masters 1000 titles. 175 weeks No. 1

Djokovic by 32d birthday

15 GS singles titles. 33 Masters 1000 titles. 252 weeks No. 1

— Christopher Clarey (@christophclarey) May 22, 2019