The action at the U.S. Open has been nonstop so far in Flushing.

On Tuesday night, 15-year old Coco Gauff made an awesome debut at the tournament. She said she was nervous going against fellow teenager Anastasia Potapova. After dropping the first set, Coco found her groove and won the second set.

In the third - she truly became the comeback kid, wining the last two games and the match. She's into the second round.

Here’s a look at all of today’s matchups, including action from the Williams sisters and defending champ Novak Djokovic.