Horacio Armando de la Peña (born 1 August 1966[1]), nicknamed "el Pulga" ("the Flea"),[6] is a tennis coach and a former tennis player from Argentina, who reached a career-high singles ranking of World No.

[1] He won four ATP World Tour titles in his career, all of which were on clay.

[7] De la Peña is most well known as the former coach of Chilean Fernando González.

[8] He was also considered the unofficial captain of the Chilean Davis Cup team.

[8][9] As well as González, de la Peña has coached other tennis players, like Franco Squillari,[10] Martín Rodríguez,[11] Guillermo Coria,[12] and a number of other Chilean and Argentine tennis players.