Christian Guillermo Martín Ramos Garagay (born 4 November 1988) is a Peruvian professional footballer who plays for the Sport Boys and the Peru national team as a centre-back.

He later participated in the 2015 Copa Libertadores, where he demonstrated his performance, notable against Argentine giant and later champions River Plate where he provided a good pass for teammate Marcos Delgado to score in an eventual 1–1 draw in El Monumental.

With little opportunity in Argentina, Ramos signed for Ecuadorian giant Emelec as a loan, to replace for Gabriel Achilier who left for Mexico.

However, he regained his position and became a frequent starter for the Ecuadorian side, helping the club to reach the round of sixteen in 2017 Copa Libertadores before losing to San Lorenzo de Almagro on penalty.

With these experiences and good performance in club level, he was called up into the national team of Peru, first for the failed 2010 World Cup qualifiers where he debuted against Venezuela in a 1–3 away defeat.

He presided over ongoing turmoil of the national team and appeared in a string of friendlies in 2014, where he would score his first international goal against Panama in Lima on 6 August, which Peru won 3–0.

His ongoing good form continued throughout the qualification and in the decisive home game playoff against New Zealand, he scored his third and the most important goal in his career, to give Peru a 2–0 win and the country's return to FIFA World Cup after 36 years.

[11] He made into the final 23 in the 2018 FIFA World Cup, appeared in all three group stage games as Peru exited with one win and two defeats.