Few have engaged tennis fans quite like Ana Ivanovic; the former No.1 and 2008 French Open champion has a combined 4.5 million followers on Facebook and Twitter.

Those fans took to social media to express their gratitude for their favorite player with the hashtag #ThankYouAna. Check out some of the best fan tweets below:

Congratulations @AnaIvanovic on amazing career! Tennis Twitter wishes you all the best in your next life chapter. Love you ♥??? #ThankYouAna pic.twitter.com/xUULR9Tr7u

— WTA Scores (@Scores_WTA) December 28, 2016

#ThankYouAna For everything you gave to this sport, you are one of my idols, i grew up watching you play. I'll miss you ? @AnaIvanovic pic.twitter.com/XHWSHvT5IA

— Ana Maria Duarte (@anamis2002) December 28, 2016

Her signature one last time #ThankYouAna ? pic.twitter.com/GsUUIbv1MD

— Romi Castagnino (@romi_castagnino) December 28, 2016

@WTA @AnaIvanovic witnessing Ana beat Serena Williams live at the #AusOpen back in 2014! What a match! #ThankYouAna ?

— Mitch (@carnesy56) December 28, 2016

@WTA @AnaIvanovic her passion and love for the game #ThankYouAna ❤ pic.twitter.com/osQlKezXgB

— Delia Vasilca (@DeliaVasilca) December 28, 2016

@WTA Whenever she would show her strength and courage through one of her “Ajde” #ThankYouAna

— Isabel (@isblcsta) December 28, 2016

The reason I fell in love with tennis #ThankYouAna pic.twitter.com/pIFcyrTwkZ

— Isabel (@AjdeAnci) December 28, 2016

@WTA @AnaIvanovic seeing her smile on court #ThankYouAna

— Lee Gresswell (@GoonerGrez) December 28, 2016

@WTA @AnaIvanovic RG 2008, without a doubt. #ThankYouAna ❤?

— Donnatella. ♕ (@sweetbackhand) December 28, 2016

No. 1
15 titles.
A Grand Slam. #ThankYouAna pic.twitter.com/Kk7SIoP182

— Ana Ivanovic (PK) (@IvanovicLive) December 29, 2016

Wishing you all the very best in retirement @anaivanovic, thanks for the memories! #HopmanCup #ThankYouAna pic.twitter.com/gSA5YIXm2y

— Hopman Cup (@hopmancup) December 29, 2016

@AnaIvanovic thank you #ThankYouAna pic.twitter.com/xUZuzdIMig

— Tennis World TV (@TennisWorldTV1) December 29, 2016

This one is a classic. She became number one. I cried. #ThankYouAna 1️⃣ https://t.co/xIOf2riTAn

— Donnatella. ♕ (@sweetbackhand) December 29, 2016

#ThankYouAna for making me love this game and being true inspiration on&off the court. Too much❤️for u over the years! You'll be so missed#1 pic.twitter.com/lR4yegJLnU

— Erdem Yıldız (@yldz3rdem) December 29, 2016

#ThankYouAna for inspiring me to play tennis again. You are my hero, my idol and my role model. Keep inspiring @AnaIvanovic. ?? @WTA pic.twitter.com/1y1DhX2tzH

— Emmanuel Damian (@damian_emman) December 29, 2016

#ThankYouAna @AnaIvanovic we will miss your smile, your charm & your talent…a beautiful soul inside & out…well done & all the best??❤✨ pic.twitter.com/Jqi2N1OqHA

— Dannii (@fikinoki) December 29, 2016

Our Tennis Princess ?? gonna miss you so much on tour! @AnaIvanovic #ThankYouAna pic.twitter.com/pi1ZUoYNXP

— Mabel (@mabelcheung14) December 29, 2016

#ThankYouAna for a those amazing years and great memories

— Lizzie (@eliza_2210) December 29, 2016

That smile, that grace, that forehand, that class….@AnaIvanovic … Tennis will miss you… #ThankYouAna

— Tejas Sonawane (@tejassonawane47) December 29, 2016

@AnaIvanovic #ThankYouAna #1 pic.twitter.com/4S2ZSbRodx

— alex (@alexaparicio07) December 29, 2016

@WTA #ThankYouAna … You will be missed Ana, good luck @AnaIvanovic

— PRO Team Tennis Camp (@ProTeamTC) December 29, 2016

@AnaIvanovic Congratulations on an AMAZING career Ana and all the best for this new chapter in your life! #ThankYouAna ❤️❤️❤️

— François Lambert (@moifrancois1) December 29, 2016

#ThankYouAna ❤?? pic.twitter.com/EYELw6lsgg

— Donnatella. ♕ (@sweetbackhand) December 29, 2016

In 2008 at Montréal. She was my idol. So, my parents bought me tickets to see her. I was 10 years old. Best day of my life. #ThankYouAna

— Isabelle (@isadescoteaux) December 29, 2016

@WTA @AnaIvanovic The incredible 3 set 2014 ASB Classic final against @Venuseswilliams ?? #ThankYouAna

— Kenan Petersen (@TheRealKenan) December 29, 2016

@WTA @AnaIvanovic We will really miss you Ana? I pray for your future success?? #ThankYouAna ❤️ pic.twitter.com/0UcVaBkmft

— Yuri (@SL_AK_Fan) December 29, 2016

WTA will never be the same without this gracious beauty! #ThankYouAna @AnaIvanovic always a bliss to watch her.

— Chrisben (@superkingchris) December 29, 2016

#ThankYouAna for all the emotions ? pic.twitter.com/VC8ZUq3DIU

— Ana Ivanovic (PK) (@IvanovicLive) December 29, 2016

Congrats on a very successful career @AnaIvanovic I will miss watching you compete Good luck on your future endeavors????#ThankYouAna #CHAMP

— Katie Gauntner (@KGauntner699) December 29, 2016

Missing her already… THANK YOU ANA! #ajdeforever#ThankYouAna

— Paola Nava (@paolanava) December 29, 2016

@AnaIvanovic #ThankYouAna pic.twitter.com/vTZmU6MS8e

— TeamAnaIvanovic (@InvanovicTeam) December 29, 2016

#ThankYouAna pic.twitter.com/CWYP79OHDb

— Cedric (@wtafever) December 29, 2016

#ThankYouAna pic.twitter.com/b6kp6HQ5qo

— GenieArmy_Thailand (@MyMacho7) December 29, 2016

#ThankYouAna pic.twitter.com/dqIWZd4kfT

— Junaid RIzvi (@imrizvi) December 29, 2016

What a funny moment it was! #ThankYouAna pic.twitter.com/9ijohL0Rtm

— Team Halep (@FansOfSimona) December 28, 2016