Mathieu Upset; Moya, Massu Win at ATP Amersfoort

The Spaniard, currently No. 62 in the INDESIT ATP Rankings, knocked out second-seeded Paul Henri Mathieu 6-4, 6-2 in 81 minutes.

Ramirez Hidalgo converted all five of his break point opportunities, winning 23 of 31 points on first serve.

Mathieu, who enjoyed a straight sets victory over Italian Alessio di Mauro on Monday, holds a 16-18-match record this season.

Ramirez Hidalgo advances to his third ATP-level quarterfinal of the season, improving his win-loss record to 15-10. The 28-year-old has reached the Vina del Mar semifinals and Buenos Aires quarterfinals during February's South American swing.

He will next meet sixth-seeded Alberto Martin, a 6-2, 6-4 winner over Edgardo Massa in one hour and 26 minutes. Martin gained revenge for Massa's 6-4, 6-4 victory at Buenos Aires in 2003.

Fourth-seeded Nicolas Massu beat Costa Rican Juan Antonio Marin for the second time this year for a place in his sixth ATP-level quarterfinal.

Costa do Sauipe winner Massu backed up his victory over Marin in Vina del Mar, needing two hours and 26 minutes for a 6-4, 7-6(2) victory.

The Chilean, currently No. 37 in the INDESIT ATP Rankings, has also reached the Casablanca and Vina del Mar finals this season.

The Chilean, currently No. 37 in the INDESIT ATP Rankings, has also reached the Casablanca and Vina del Mar finals this season.

He will play former World No. 1 and Buenos Aires champion Carlos Moya, who edged past Italian qualifier Fabio Fognini 7-5, 6-3.
-- ATP