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.His usual position was at centre. He was part of the Argentine squad for the 2007 Rugby World Cup which succeed in gaining Argentina's highest world cup finish of third place and Argentine squad for the 2011 Rugby World Cup in New Zealand.