Despite beating Vania King 6-3, 6-3, Serena Williams was not happy with her performance on Thursday at the US Open.
Williams blew her opponent away with sheer power in the second round at the US Open however, the world number one was frustrated with the amount of unforced errors she made.
She made 28 of them to be exact but there was certainly still enough good stuff in there for her to be happy about her game. Not the 22-time grand slam champion. She expects more of herself.
"I just think it should have been a different scoreline for me," Williams sighed afterwards.
"I feel like I made a lot of errors. I just didn't have a great day today.
"But it's always good to get a win when you're not playing well.
"I definitely don't think I played the way I did in my first round.
"It's stable. I just got to keep it like that.
"It's two matches in, and usually, you want to be able to play seven matches. It's not even close to the halfway point.
"I definitely want to keep it as good as it can be."
Williams next faces Johanna Larsson on Saturday and the latter is expected to offer little resistance to the women who is out to overtake Steffi Graf's Open-era record of 22 grand slam singles titles.