Marcelo Andrés Ríos Mayorga (born December 26, 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 has held the top ranking in both juniors and seniors.
He has held the top ranking in both juniors and seniors. He was the first player to win the three clay-court Masters Series tournaments (Monte Carlo, Rome, and Hamburg) since the format began in 1990. He is the only male player in the open era to have been World No. 1 while never managing to win a Grand Slam singles tournament in his career. He did reach the 1998 Australian Open final, losing to Petr Korda.
Ríos began playing tennis at the age of 11 at the Sport Francés golf club in Vitacura (Greater Santiago), adjacent to his house.
In 2001 Ríos won the first tournament of the year in Doha. However, his performance in the following tournaments was weaker, weakened by an ankle operation, which resulted him to drop out of the top 50 in the world for the first time since he was a teenager. In September Ríos won another title, this time in Hong Kong, defeating German Rainer Schüttler in the final. Ríos decided to return in October to play a Challenger tournament, winning the final of Santiago beating the Argentine Edgardo Massa in the final. Also reached a doubles final in Scottsdale. Ríos ended the year as No.39 in the world.
Marsecelo Rios Performance
In 1993. Ríos became the first male player from Latin America to be ranked world number one in juniors. That year, he won the boys' singles title at the US Open and his first satellite tournament in Chile.
On March 29, 2006, Ríos, aged 30, debuted on the ATP Champions Tour, a tour for former tour players. At his first tournament on the tour in Doha, Qatar, he defeated Thomas Muster, Henri Leconte, Pat Cash, and Cédric Pioline to claim the title. The following week he repeated, this time winning the crown in Hong Kong, where he won the final before an also former world No. 1 Thomas Muster. Rios won six tournaments in a row, adding Algarve Graz, Paris and Eindhoven to the above. His inclusion on the senior circuit caused mild controversy, as he was significantly younger than many of his fellow competitors. He ended the year as number one, winning a total of six tournaments and holding a winning streak of 25 matches, achieving the record of being the only player in history to be No. 1 in the world as a junior, professional and veteran.