Gonzalo Tiesi, born April 24, 1985, in Buenos Aires, Argentina, is an Argentina rugby union footballer.

Tiesi used to play for Harlequins in the english Guinness Premiership. As of 2011, he plays for Stade Francais in the French Top 14. Tiesi has also played for the Argentina national team, Los Pumas. His usual position is in the centres.

Tiesi formerly played for the San Isidro Club, north of Buenos Aires.Prior to signing with Harlequins he played for London Irish and has earned five caps for the Pumas, and scored three international tries, as well as having represented Argentina at the IRB Sevens event in Los Angeles

Tiesi also played for Buenos Aires Province in 2005 and previously represented Argentina at both under-21 and under-19 level.

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