Caroline Wozniacki celebrates 26th birthday with David Lee -- in the gym

— -- If you're looking for some fitspiration today, look no further. Caroline Wozniacki has got all the #WorkoutGoals you could possibly want on a Monday. The tennis star -- who is celebrating her 26th birthday Monday from the gym -- posted a video of her weight training on Instagram, and it's pretty impressive.

If you don't believe me, you can just ask NBA free agent David Lee. Or just watch for yourself below.