Marcelo Ríos Marcelo Ríos Marcelo Andrés Ríos Mayorga (; born 26 December 1975) is a former world No. 1 tennis player from Chile. Nicknamed "El Chino" ("The Chinese") and "El zurdo de Vitacura" ("The Lefty from Vitacura"), he became the first Latin American player to reach the top position on the Association of Tennis Professionals (ATP) singles rankings in 1998. He held the world No. 1 ranking for six weeks. He also held the top ranking in both juniors and seniors. He was the first player to win all three clay-court Masters Series tournaments (Monte Carlo, Rome, and Hamburg) since the format
Mark Nielsen (tennis) play-off tie against Spain in 1999, which the New Zealanders lost without winning a match. Nielsen lost both of his singles rubbers, to Felix Mantilla and Francisco Clavet, but did take the former into a fifth set. Nielsen was a wildcard entrant at the 1998 Heineken Open and in front of his home crowd defeated Brazilian Fernando Meligeni in the opening round, before being eliminated by Marcelo Rios. He competed in the Heineken Open a further seven times and also reached the second round in 2002, with a win over seventh seed and world number 33 Andreas Vinciguerra. With partner