Lindsay Davenport has regained the world number one spot after beating Anna Chakvetadze in the semi-finals of the New Haven Open in Connecticut.
The 6-3 6-3 victory ensures that the 29-year-old American will return to the top of the rankings next week.
Davenport has been out of action for two months with a back injury and lost top spot to Maria Sharapova on Monday.
She will meet Amelie Mauresmo in the final after the second seed's 4-6 7-6 6-2 win over Anabel Medina Garrigues.
Mauresmo looked to be heading out of the event as she trailed by a set and a break at 4-3 in the second set.
But the Frenchwoman broke back in the eighth game and, after taking the tie-break, she broke twice in the decider to reach her fourth final of the year.
Davenport admitted after her victory that she was more concerned with playing well at next week's US Open than taking the number one spot again.
"I suppose the end of year ranking is more important, and I guess if I win the US Open then I'll be number one," she said.
"Amelie and I played such a close match at Wimbledon, and I'm looking forward to playing her again."