|Born||6 June 1956|
|Died||19 May 2010(aged 53)|
|Height||1.75 m (5 ft 9 in)|
|Highest ranking||No. 89 (26 Dec 1979)|
|Grand Slam Singles results|
|French Open||1R (1980, 1981, 1983)|
|Highest ranking||No. 110 (9 Jul 1984)|
|Grand Slam Doubles results|
|French Open||1R (1980, 1981, 1984)|
|US Open||1R (1979)|
Gattiker made four Grand Prix doubles semi-finals during his career, at Buenos Aires in 1977, Indianapolis in 1980, Kitzbuhel in 1981 and Bahia in 1983. His partner in Kitzbuhel was his brother Alejandro Gattiker.
He also partnered his brother at Grand Slam level. One of their three Grand Slam appearances together was at the 1980 Wimbledon Championships, where they lost a five-set match to another pair of brothers, John and Tony Lloyd. Gattiker played in five further Grand Slam tournaments, as either a singles of doubles player, but was never able to progress past the first round.
After retiring, Gattiker turned to coaching. Gattiker worked mostly with players from Argentina, including Pablo Albano and Luis Lobo, but also coached Morocco's Karim Alami. He died in 2010 of amyotrophic lateral sclerosis, which he had been suffering for 12 years.
|1.||1979||Ribeirão Preto, Brazil||Clay||Carlos Kirmayr||6–4, 2–6, 6–2|
|1.||1980||Cuneo, Italy||Clay||Ricardo Cano|| Mario Martinez
|4–6, 7–6, 6–2|
|2.||1981||Galatina, Italy||Clay||Patrizio Parrini|| Roberto Carruthers
|6–4, 5–7, 7–5|
|3.||1983||Le Touquet, France||Clay||Alejandro Gattiker|| Tarik Benhabiles
|4.||1983||Messina, Italy||Clay||Alejandro Gattiker|| Juan Aguilera
|5.||1984||Vina Del Mar, Chile||Clay||Gustavo Tiberti|| Hans Gildemeister
|6–4, 5–7, 6–3|