Complex sentence: The two clubs had faced each other during the season in the 1984 European Super Cup at Juventus' home ground, the Stadio Comunale, and was won 2--0 by Juventus with two goals from Zbigniew Boniek.
Split into simpler sentences: The two clubs had faced each other during the season in the 1984 European Super Cup. The match was held at Juventus' home ground, the Stadio Comunale, and was won 2--0 by the Italian team, courtesy of two goals from Zbigniew Boniek.