Serena not happy with second round win

NEW YORK (AP):

Maybe Serena Williams simply wanted to put on a better show for her pal BeyoncE.

Looking rather displeased with herself at times, including when she shook her head and smirked on the way to the net for a post-victory handshake Thursday night, Williams still managed to tie Martina Navratilova's professional-era women's record with her 306th career victory in Grand Slam matches.

Williams beat Vania King 6-3, 6-3 to reach the US Open's third round.

"I just think it should have been a different scoreline for me. I feel like I made a lot of errors," Williams said. "But, you know, there's nothing I can do about that now. What really matters is I got the win. Hopefully, I'll just get better."

Really? This performance didn't seem OK? After all, Williams delivered 13 aces with serves that reached 121 mph. She compiled a 38-4 edge in winners. She only dropped six games and needed all of 65 minutes to win.

"I just didn't have a great day," was her assessment.

Yes, there were problems. The 28 unforced errors. The return game: She won only 13 of 40 points on King's first serves. Williams did, however, smack one backhand return winner in the final game.

Music power couple of BeyoncE and Jay Z sat behind Williams' coach, Patrick Mouratoglou, in the player's guest box Thursday.

"It's always good," Williams said casually, "to have BeyoncE and Jay in the box."