Marcelo Andrés Ríos Mayorga (Latin American Spanish: [maɾˈselo ˈri.os]; born 26 December 1975) is a Chilean former world No. 1 tennis player. He became the first Latin American player to reach the top position on the Association of Tennis Professionals (ATP) singles rankings in March 1998, holding the spot for six weeks. He also held the top ranking in juniors. At 1.75 m (5 ft 9 in), Ríos is the shortest man to hold the number 1 ranking in men's tennis.
https://en.wikipedia.org/wiki/Marcelo_R%C3%ADos