Jennifer Capriati and Serena Williams will meet in a Grand Slam quarter-final for the third time this year after both won their US Open fourth round matches.
Williams fired down 12 aces in a 6-4 6-2 demolition of Patty Schnyder in less than an hour.
Capriati saved a set point in the first set before hitting top gear in the second to see off Ai Sugiyama 7-5 6-2.
Capriati beat Williams at this year's French Open but the latter got her revenge a month later at Wimbledon.
The pair have played 16 times in their careers, with Williams leading the series 10-6, but 11 of those encounter have gone to three sets.
Capriati believes she is hitting the kind of form which could threaten Williams.
"It's exciting. I feel like I'm playing well and my chances are good," she said.
Williams is also looking forward to the clash, adding: "I like playing Jennifer a lot, I really do.
"We always play each other.She's doing well and we both want to fight to get to the semi-finals."
Williams admitted she was advised by three doctors not to play at the US Open because of ongoing pain from the knee injury which kept her sidelined for more than eight months.
"I am just excited to be here because I wasn't supposed to come," she said.
"Not one of them said it was OK. But it kind of went in one ear and out the other. I took my own advice.
"My knee is doing pretty good right now. I haven't had any worries. I'm really proud of my legs."
Amelie Mauresmo set up a quarter-final against Elena Dementieva with a 6-4 6-2 win over 16th seed Francesca Schiavone.
Mauresmo can become world number one at the end of the US Open if she progresses further than Justine Henin-Hardenne, but the Frenchwoman is focused on winning her first Grand Slam.
"The main thing for me is to win. The rest will come - if I win here I know I'm going to be number one," she said.
"I had a great time in Athens (winning the Olympic silver medal) and it gives me a lot of confidence coming here, and it's getting better and better."
The Frenchwoman will be out for revenge against Dementieva, who beat her in the quarter-finals of the French Open.
Dementieva recovered from an awful start to beat an emotional Vera Zvonareva 1-6 6-4 6-3 in a bizarre fourth-round match.
Zvonareva romped through the opening set against her fellow Russian, but Dementieva slowly worked her way back.
The French Open runner-up levelled the match, with Zvonareva often bursting into tears and smashing her racket.
And Dementieva won seven of the last 10 games to advance to a meeting with Amelie Mauresmo or Francesca Schiavone.
Zvonareva said it was natural for players to be emotional.
"You wouldn't see any fourth round matches at a Grand Slam that weren't emotional," she said.
"You can't just go on court and not care about what's going on."
Dementieva denied her opponent's tears were offputting, adding: "She sometimes cries on court. I was concentrating on my game. I didn't look at her."