There were some bumps in the road for a couple of top names, but most seeded players moved along into week two of the US Open.
These are the Top 5 photos from the New York.
1
Serena Williams
The 23-time Grand Slam champion got off to a shaky start, but she didn't let it derail her. Serena rallied her way back to victory, posting a 2-6, 6-2, 6-2 score over countrywoman Sloane Stephens.
"It was intense, I have to say," Serena said during her on-court interview. "We always have some really incredible matches. It brings out the best in my fitness when I play Sloane."