Gonzalo Tiesi (born 24 April 1985 in Buenos Aires) is a retired Argentine rugby union player.
Tiesi played for the London Irish, Harlequins, Stade Français, London Welsh and Newcastle Falcons, as for 31 December 2012 won 32 full caps for his national team, Los Pumas.
Tiesi formerly played for the San Isidro Club, in the north of Buenos Aires.
He also played for Buenos Aires Rugby Union in 2005 and previously represented Argentina at both under-21 and under-19 level.
At the end of 2011–12 season he left France for getting back to San Isidro Club of Argentina;[1] in January 2013 Tiesi was signed by the London Welsh.