Serena Williams says she still has a “really long way to go” to win a record-equalling 24th Grand Slam singles title at the US Open.
Williams plays Anastasija Sevastova in the semi-finals on Thursday and is the only major winner left in the draw.
A seventh US Open title would see the American equal Margaret Court’s Grand Slam haul but Williams has lost her last two semi-finals in New York.
Williams, 36, also lost to Angelique Kerber in this year’s Wimbledon final.
“I’d been a couple of steps away at the last Grand Slam, so I’m definitely not ahead of myself,” Williams said.
“I still know that no matter whether I’m in the semi-finals or the finals, I have a really long way to go to win.”
Williams is also aiming for a first Grand Slam title since giving birth to her daughter last year.