Juan Ignacio Londero (; born 15 August 1993) is an inactive Argentine tennis player.
Londero reached his career-high ATP singles ranking of world No. 50 in November 2019 and his highest ATP doubles ranking of world No. 186 in March 2020.
Londero made his first appearance on an ATP World Tour in July 2013 when he lost in the first round of 2013 Claro Open Colombia against eventual champion Ivo KarloviÃÂ.
He managed to win his first tour level match at the 2019 Córdoba Open against Nicolás Jarry and subsequently won his first ATP title at the tournament as a wildcard, defeating Guido Pella in the final.
He reached the fourth round of the 2019 French Open for the first time at a Major. He entered the 2022 French Open as lucky loser.
Current after the 2022 French Open.