The first round in the Women's Draw is complete and we have already seen some surprises as well as some very solid play.

Here are some of the first round highlights from Flushing Meadows:

Probably the biggest shocker was the departure of 8th seed Caroline Wozniacki. It was clear that Wozniacki was not herself under the lights on Tuesday. Coming off of a knee injury prior to the Open, she made a number of unforced errors and looked to have problems moving around the court against Irina-Camelia Begu. She was eliminated 2-6, 2-6. Wozniacki looked to have re-injured the knee early in the second set as the trainer retaped it. But she was clearly not on her game and exits in the first round.

Serena Williams was on her game. She was focused and powerful and took little time to defeat big server CoCo Vandeweghe 6-1, 6-1. Picking up where she left off at the Olympics, Williams came up with big serves and solid ground strokes and took advantage of Vandeweghe's struggles on serve. The 4th seed moves on to face Maria Martinez Sanchez in the second round.

Meanwhile another American made some noise in the first round.  Sloane Stephens upset veteran and 22nd seeded Fransesca Schiavone of Italy. Stephens has been tabbed as one to watch as her ranking has soared. She has a history of doing well early at Majors and today won in straight sets, 6-3, 6-4 over the former Majors Champion.

Unseeded Venus Williams had no problems in her opening round match against Bethanie Mattek-Sands. She won in straight sets 6-3, 6-1. After the match Williams was asked how she felt and responded, "I can't complain". She will face Angelique Kerber, the 6th seed who dispatched Anne Keothavong 6-2, 6-0. Kerber will be a real challenge for Williams.

Top seeded, Victoria Azarenka made quick work of Alexandra Panova 6-0, 6-1 to advance to the second round. The match took just 50 minutes as the top seed had 20 winners to her opponents 2.

Elsewhere, it was 3rd seeded Maria Sharapova who had very little difficulty in her first round match defeating Melinda Czink of Hungary in straight sets, 6-2, 6-2. She will face Lourdes Dominguez Lino in the second round as the former U.S. Open Champion looks for another Title.

Fan favorite and 23rd seed Kim Clijsters in her final U.S. Open advanced past 16 year old, Victoria Duval in Arthur Ashe Stadium. Duval won her way into the field as a USTA under 18 qualifier. Clijsters will retire after the Open and has a huge following in New York. She will face Laura Robson in the second round.

16th seeded Sabine Lisicki was upset by Sorana Cirstea 4-6, 6-2, 6-2. Lisicki struggled with her serve at times tossing in 8 double faults. She also had 42 unforced errors in the match which contributed to her defeat.