Jennifer Capriati, the 2001 champion, created an upset at the French Open as she marched into the semi-finals at the expense of Serena Williams.
In an all-American duel, which was twice interrupted by rain, the seventh seed got the better of the second seed, winning 6-3 2-6 6-3.
Williams won the 2002 title at Roland Garros, but she bowed out after one hour and 40 minutes of play.
Capriati, who has also beaten Williams in the recent WTA Tour event in Rome, clinched victory at the second attempt after being forced to replay a point when leading 40-30 in the ninth game of the deciding set.
A Capriati shot was declared out, which was a decision she disputed, and the umpire then called for the point to be played again.
Williams netted in the next rally, to end her involvement in the singles and put Capriati in sight of the final.
It was a rollercoaster sort of match.
Capriati was facing break point in the first set when serving at 3-3, but she pulled the situation around and rolled off three straight games to seize an advantage in the match.
As the players dodged rain showers in Paris, the momentum swung the way of Williams in the second set, and she broke twice to establish a 4-0 lead en route to levelling up the match.
From there it was a case of who would keep their nerve, and Capriati showed the greater composure.
With her opponent apparently troubled by an injury to her left thigh, Capriati was able to break serve early to move 3-1 in front.
But it was soon 3-3 as Williams, despite struggling on her first serve, fought hard to stay in contention.
The two former champions had put on an enthralling exhibition which required one of them to surge clear in the closing stages, and it was Capriati who claimed another break of serve to move 5-3 ahead with a powerful forehand.
Capriati closed out the match, after the line-call controversy, and then revealed her satisfaction.
“I am so happy. I feel the peak of my tennis is coming round,” she said.
“And as a whole I have probably played better than Serena in the whole tournament.”