Julio Leonardo Peralta Martínez (Spanish pronunciation: [ˈxuljo leoˈnaɾðo peˈɾalta maɾˈtines];[3] born 9 September 1981)[1] is an inactive professional tennis player from Chile.

He made his comeback (after long, exhausting, two-year injury) in the 2011 Sparkassen Open, winning comfortably the first two qualifying rounds, against Stefan Seifert and David Goffin (no.

After a long hiatus, he returned in September at the 2014 Napa Valley Challenger doubles tournament partnering Matt Seeberger as a wildcard pair.

Peralta played many Challenger Tour tournaments during the year, reaching seven finals and winning four, partnering Horacio Zeballos in three of these titles.

Peralta also won six challenger tournaments, partnering Zeballos in four, in one with Dennis Novikov, and at Santiago with countryman Hans Podlipnik.

Julio and Horacio Zeballos reunited for attempting a defense of their title in the U.S. Men's Clay Court Championships, but they lost in first round.

The following week Peralta and Zeballos won another title, the 2018 German Open, his first on the ATP 500 level, defeating Oliver Marach and Mate Pavić in the final.

[6] Peralta was born in Brasília, Brazil, and began to play tennis in Paramaribo, Suriname, where his father worked as a dentist.