Top-seeded David Nalbandian defeated former champion Luis Horna 7-5, 6-1 at the Abierto Mexicano to reach his second final in as many weeks on Friday.
In the final, Nalbandian will play sixth-seeded Nicolas Almagro, who prevented a repeat of last Sunday's Buenos Aires final by edging unseeded Jose Acasuso of Argentina 6-4, 3-6, 7-5.
Also, women's top seed Flavia Pennetta advanced to her fifth consecutive final in Acapulco, where she'll come across No. 2-seeded Alize Cornet.
Nalbandian, who won in Buenos Aires before home fans last weekend, has won 10 straight matches.
"I am very confident after having won in Buenos Aires, I think I'm playing very well," he said.
After claiming the only break of the first set, Nalbandian broke 2006 champ Horna three more times.
"The first set was close, and once it was over David began to loosen up and I didn't feel sure of myself, and things got worse. He was making better shots and it got complicated," Horna said.
"I leave happy, I hope I can win in the doubles, but at any rate I leave happy, I played well and lost to an excellent opponent."
Almagro won a sixth straight match against Acasuso, who was the runner-up in Buenos Aires. Acasuso broke Almagro in the opening game of the third set and led 2-0 but the Spaniard drew even at 3-3 and broke Acasuso in the final game. Almagro served a dozen aces in the dirt.
He has already earned a title on this Latin American claycourt swing in Brazil.
Pennetta eased past No. 7 Kaia Kanepi of Estonia 6-4, 6-2 in the semifinals.
The Italian has appeared in every Acapulco final since 2004, but won only in 2005. Two weeks ago she won her fifth career title in Chile but was upset last week in the first round in Colombia.
"It's incredible, it's really exciting to play a fifth final here. I am very happy" said Pennetta, who will meet Cornet a second time. "We played in the quarterfinals last year here, and she was playing well. You have to play your best tennis to beat her."
French teenager Cornet downed Jill Craybas of the United States 6-2, 6-2 to move into her first career final. She's yet to drop a set.