Britain's Johanna Konta was knocked out of the Wuhan Open in the quarter-finals, losing 6-3 6-4 to Czech 14th seed Petra Kvitova in China.
Kvitova, playing the day after her mammoth three-hour victory over Angelique Kerber, put in a dominant performance against Konta.
The defeat keeps Konta 10th in the race to qualify for the WTA Finals, 273 points behind the final place.
Kvitova faces Romania's fourth seed Simona Halep in the semi-finals.
Konta, 25, matched last year's run to the quarter-finals in Wuhan but missed out on a chance to close the gap in the contest for places at the season-ending finals in Singapore next month.
She is also on the verge of becoming only the third British woman to break into the world's top 10.
"In terms of rankings, rankings come and go," said Konta. "I don't play tennis for my ranking. I play it because I love the sport and I want to be the best that I can be at it.
"I'm just competing in the events that I'm in at the moment. This week I was just here in Wuhan. I'm not thinking about what will come. A lot of those things are actually not all under my control. It also depends on how other players do.
"There's not much point for me to really look at it.
"So now I'm going to be in Beijing and I'm going to try to do the best that I can."
Konta faces a tough opening match in next week's Beijing Open, where she will face Anastasija Sevastova, the Latvian who knocked her out of the US Open in the fourth round earlier this month.