Miguel Olvera was a tennis player in the 1960s and 1970s, playing for Ecuador.

In 1960, as an unseeded player, he won the singles title at the Cincinnati Masters

Cincinnati Masters

The Cincinnati Open is an annual outdoor hardcourts tennis event held in the Cincinnati suburb of Mason, Ohio, USA. The event started on September 18, 1899 and is the oldest tennis tournament in the United States played in its original city., Between...

. He remains to this day the only unseeded player ever to win the singles title in Cincinnati. (The tournament began in 1899 and seeding began in 1927.)

In 1967 in Guayaquil, Ecuador, Olvera and teammate Pancho Guzman led the Ecuadorian Davis Cup to a stunning upset of the mighty United States Davis Cup team. After American Cliff Richey

Cliff Richey

Cliff Richey played amateur and professional tennis in the 1960s and 1970s. He is the brother of fellow player Nancy Richey....

 defeated Guzman in the first singles match, Olvera, then 26 years old, faced Arthur Ashe

Arthur Ashe

Arthur Robert Ashe, Jr. was a professional tennis player, born and raised in Richmond, Virginia. During his career, he won three Grand Slam titles, putting him among the best ever from the United States...

 in the second singles match. Ashe had never lost a set in ten previous Davis Cup matches, but Olvera came back after dropping the first set to win 4–6, 6–4, 6–4, 6–2.

Ecuadorian captain Danny Carrera was so thrilled with the win that he attempted to jump the net to embrace Olvera, tripped and broke his leg. Guzman, age 21, then teammed with Olvera in the doubles, and overcame a 0–6, 2–5 deficit to knock off Marty Riessen

Marty Riessen

Marty Riessen played amateur and professional tennis in the 1960s and 1970s. He was ranked as high as No. 11 in the world in singles on the ATP Rankings...

 and Clark Graebner

Clark Graebner

Clark Graebner , is a retired American professional tennis player, originally from Cleveland, Ohio, who won a number of championships. He graduated from Northwestern University, where he joined the Delta Upsilon fraternity. Graebner's deceased wife, Carole, was also a successful touring tennis...

, 0–6, 9–7, 6–4, 4–6, 8–6. The next day, Guzman beat Ashe in five sets to give Ecuador the victory.

Today, Olvera is a tennis coach in Guayaquil, Ecuador.In "Centro Nacional de Tenis" in Lomas de Urdesa he coaches kids like: Sergio Mejìa, José Antonio Moya,and Raùl Moreano