Pablo Cuevas of Uruguay and Luis Horna of Peru won the French Open men's doubles title Saturday, making them the first all-South American duo to become Grand Slam champions in the 40-year Open era.
Ninth-seeded Richard Gasquet was upset by Peruvian qualifier Luis Horna 6-4, 6-1 Monday in the opening match of the Rome Masters.
Top-seeded David Nalbandian advanced to his second straight clay-court final, beating 2006 champion Luis Horna 7-5, 6-1 in the Mexican Open.
Carlos Berlocq beat defending champion Luis Horna 7-6 (3), 3-6, 7-6 (3) to advance to the Movistar Open quarterfinals.
Luis Horna began the defense of his title in the Movistar Open with a 6-4, 6-4 first-round win over Agustin Calleri.
Luis Horna beat Jeremy Chardy of France 7-5, 6-3 Monday behind a dominant serve to advance to the second round of the Austrian Open.
Defending champion and top seed Tommy Robredo lost his opening match at the Swedish Open on Monday to Peruvian Luis Horna 6-1, 1-6, 6-1.
Gael Monfils of France will play Juan Monaco of Argentina in the Hypo Group International final on Saturday.
Sam Querrey of the United States won his first ATP-level match on clay when he beat Luis Horna of Peru 7-6 (5), 6-4 in the first round of the Estoril Open on Sunday.
Defending champion Luis Horna lasted just two games before retiring with an injury against fifth-seeded Gaston Gaudio in the first round on Tuesday.
Juan Monaco of Argentina outlasted Luis Horna of Peru 4-6, 6-2, 6-3 to advance to the quarterfinals of the Copa Telmex.
Unseeded Peruvian Luis Horna ousted Brazil Open winner Guillermo Canas from the Copa Telmex, advancing to the quarterfinals of the clay-court tournament with a 4-6, 6-2, 6-2 victory.
Guillermo Canas eliminated top-seeded fellow Argentine David Nalbandian 6-4, 6-4 in a Copa Telmex round robin.
Unseeded Luis Horna upset David Nalbandian 6-4, 6-3 on Tuesday night at the Copa Telmex, capitalizing as the top-seeded Argentine slogged through the 90-minute match.
Peru's Luis Horna won the MoviStar Open on Sunday for his second ATP Tour title, beating hometown favorite Nicolas Massu 7-5, 6-3.
Local favorite Nicolas Massu beat Spain's Albert Montanes 6-1, 6-3 on Saturday night to advance to the Movistar Open final.