In the 1980s, Benfica continued to thrive domestically. With Lajos Baróti in 1980–81, Benfica became the first club to win all Portuguese trophies in one season: Supertaça de Portugal, Primeira Liga and Taça de Portugal. Later, under the guidance of Sven-Göran Eriksson, they won two consecutive Primeira Liga (1982–83, '83–84), one Taça de Portugal (1983) and reached the final of the UEFA Cup in 1983, lost to Anderlecht. Following improvements to the Estádio da Luz, Benfica opened the stadium's third tier in 1985, transforming it into the largest stadium in Europe and third largest in the world. A season later, after they had won the domestic Super Cup in 1985 and the Portuguese Cup in 1986, Benfica clinched the double of Primeira Liga and Taça de Portugal. Then, from 1988 to 1994, Benfica won three Primeira Liga (1988–89, '90–91, '93–94), one Taça de Portugal (1993), one Super Cup (1989) and reached the European Cup finals of 1988 and 1990, won by PSV Eindhoven and Milan respectively – these and all other Benfica losses in UEFA finals have been attributed to the "curse of Béla Guttmann".