From an initial capacity of 35,000 spectators, the stadium has undergone several major renovations, most recently in preparation for the 1990 FIFA World Cup when its capacity was set to 85,700, all covered with a polycarbonate roof.
Od prvotnog kapaciteta od 35.000 sjedala, stadion je bio podvrgnut nekoliko renovacija, najnovije u pripremama za Svjetsko prvenstvo 1990. kada je kapacitet podignut na 85.700, sav pokriven s polikarbonatnim krovom.