Olguín, who comes from Mendoza, had wins over Gustavo Kuerten, Magnus Norman and Nicolás Lapentti as a junior.

[1] His professional appearances were mostly restricted to the Challenger tour, where he won a total of four titles, all in doubles.

At the 2001 Copa AT&T in Buenos Aires, Olguín made the main round of his first ATP Tour tournament, qualifying for the doubles event with Diego del Río.

His first round opponent was third seed Nicolás Lapentti, who won the match in three sets.

He worked for many years with Martín Vassallo Argüello and is the Director of the Florida Tennis Club in Buenos Aires.