Serena says her poor effort 'inexcusable' in US Open final

Serena Williams is wondering when she will start playing like a 23-time Grand Slam champion again in a major final, calling her poor showing in Saturday's US Open final loss "inexcusable."
"I honestly don't think Serena showed up. I have to kind of figure out how to get her to show up in Grand Slam finals."
"I just couldn't go down like that, so I just wanted to play a little bit better."
- Serena seeks answers -
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"So that was obviously on my mind: 'How do I play at a level like this in a final?'"

As her recent Slam finals losses go, she rated the effort superior to that against Simona Halep in dropping last July's Wimbledon final -- "I definitely did better than I did against Halep" -- and discounted last year's Wimbledon loss to Angelique Kerber, saying, "Kerber doesn't count because I was exhausted. My baby was eight months, and that's tough."

"I honestly didn't play my best. I could have played better. That's the only solace that I can take."