updated 08/30/2014 AT 12:00 PM ET
•originally published 08/30/2014 AT 3:55 PM ET
When it comes to adorable throwback photos, this one is definitely a grand slam.
“Happy birthday, husband. Look how cute you were!” she captioned the sweet and fresh-faced shot of the tennis star as a youngster.
Roddick, a Nebraska native, was once ranked the world’s No. 1 tennis player before retiring in 2012.