Alejandro Gattiker (born 5 May 1958) is a former professional tennis player from Argentina.

[1] Gattiker, having made it through qualifying, played Mike Myburg in the first round of the 1982 French Open.

[2] The Argentinian played men's doubles at five Grand Slam tournaments, three with his brother Carlos, but was never able to get past the opening round.

[2] He made the doubles semi-finals at Kitzbühel with his brother in 1981 and was also a doubles semi-finalist twice the following year, partnering Brent Pirow at Geneva and Ricardo Ycaza at Itaparica.

[2] As a singles player he had his best win when he defeated veteran Romanian Ilie Năstase in 1981, at Viña del Mar.