Here's what you need to know:
Beatrice (who goes by Traci) is 18, and this US Open is her first senior Grand Slam tournament. She's ranked 371st in the world.
She beat 18-seeded Aravane Rezai 7-5, 2-6, 6-3 in the second round and will maybe face Sharapova in the third.
She's super cute and bubbly (a la Oudin), as you can see here:
Here is a cute blog post she wrote from this year's French Open (she was playing in the Junior division).
And here are some more pictures of her being adorbs (but maybe ease up on the eyeliner, Trace):