Marcelo Andrés Ríos Mayorga 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, Ríos is the shortest man to hold the number 1 ranking in men's tennis.

Johannes Martinus ("Jan") Siemerink is a retired tennis player from the Netherlands. The former Dutch Davis Cup captain reached a career-high ATP ranking of 14.