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Serena Williams is not focused on the prospect of a calendar Grand Slam at the US Open.
After losing her first set in her US Open and Grand Slam bid, Williams said she is not feeling the pressure of expectation - despite an error-prone 3-6 7-5 6-0 win over Bethanie Mattek-Sands.
Williams is in the midst of her second period of holding all four major titles without doing it in all one year - the previous instance being in 2003.
"I wasn't nervous at all, just the second round. From Cincinnati [onwards], I felt good. I mean, I don't have to win this event. It's not the end of the world for me," Williams told a news conference on Friday.
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"I told you getting to Wimbledon and winning the Serena Slam - that really meant a lot to me. That tournament I felt on the edge a lot. This one I don't feel that way.
"I think people feel that way more than I do, but I don't feel like I need that more than anything."
She later conceded about the awareness of her feat: "I mean, of course it's there.
"I'm not a robot or anything. But at the end of the day I'm just here to do the best I can.
"If that means I win, then great. But if it doesn't, then you know what? I can't let that affect me because I still have other tournaments to play."
Williams will next face Madison Keys, the 19th seed, in a re-match of their Australian Open semi-final in January.