Goycochea was the substitute for Nery Pumpido both in River Plate and in the Argentina national team, and got his big break in the 1990 FIFA World Cup. When Pumpido broke his leg in Argentina's second group game against the Soviet Union, Goycochea stepped in and remained the team's starting goalkeeper for the remainder of the tournament. In the knockout stage, Goycochea effectively played a huge part in keeping Argentina in the tournament; he kept a clean sheet in the 1–0 Second Round victory over Brazil and saved penalties in the quarter-final and semi-final penalty shootout victories against Yugoslavia and Italy. He was also close to saving the game-winning penalty kick from Andreas Brehme at the 1990 World Cup final against Germany, which Argentina lost 1–0.[2] He was chosen as the goalkeeper of the Cup's All-Star Team. Reflecting on the 1990 tournament, Goycochea told FIFA.com “To my mind, it was as if we were world champions again anyway”. [3]
El Goyco also played a few months in 1991 for the team Stade Brestois 29 from Brest in the region of Brittany, which was then named Brest Armorique, and was in the French second division and included players David Ginola, Corentin Martins and Stéphane Guivarc'h. Nonetheless, the team went bankrupt in November of that year, and was moved to the third division and lost its professional-team status.
His last name, Goycochea, spelled without e, but which other people of the same genealogy spell as Goycoechea, is derived from the BasquesurnameGoikoetxea meaning topmost house (from goiko "of the top" and etxe "house"). Sergio is frequently nicknamed thus El Vasco, but also El Goyco.
Goycochea is a football journalist hosting Elegante Sport (Argentina's Canal 7) and has partnered with Diego Maradona at La noche del Diez.