Let's make this birthday one to remember.

51 years old (Born on April 29, 1974)

Happy Birthday, Julian Knowle! From turning pro way back in 1992 to becoming Austria's doubles maestro, you've served up countless aces and volleyed your way into tennis history. Your Grand Slam triumph at the US Open doubles final in 2007 remains legendary—proving that age is just a number when you're smashing winners on court!

Here's wishing you another year filled with laughter, joy—and perhaps fewer double faults off-court! May your celebrations be as memorable as those epic matches where you showed us all how teamwork truly makes the dream work. Keep swinging strong; you're forever our favorite Austrian ace!