Football match
The 1977 Intercontinental Cup was an association football tie held over two legs in March and August 1978 between Boca Juniors, winners of the 1977 Copa Libertadores, and Borussia Mönchengladbach, runners-up of the 1976–77 European Cup. European Cup winners Liverpool declined to participate.
Background.
As Liverpool declined to participate, Borussia Mönchengladbach was the team appointed to play the series. Due to schedule problems, the Cup was not played until 1978, with the second leg having been held more than four months after the first game in Buenos Aires.
Previously to those series, Borussia had won the Bundesliga three consecutive times (1974–77) with notable players such as Berti Vogts and Danish forward Allan Simonsen, awarded with Ballon d'Or in 1977.
As part of the preparation for the series, Boca Juniors manager, Juan Carlos Lorenzo, sent a friend of his to Borussia's training camp (pretending to be a local journalist due to his knowledge of German language) to watch the team in action. The envoy then sent Lorenzo a detailed report about Borussia's players, their technical characteristics and skills on the field.
First leg.
The first game was held in La Bombonera, with Boca Juniors taking advantage with a goal by Ernesto Mastrángelo, but Borussia scored two goals for a partial 2–1 win until Jorge Ribolzi scored for the 2–2 that would be the final result.
Second leg.
In October, Boca Juniors travelled to Germany to play the second leg, with the media being sceptical about a victory there. As Borussia's stadium was being refurbished, the match played at Wildparkstadion, which was remarkable for being the stadium with the best lighting throughout Germany by then.
Coach Juan Carlos Lorenzo surprised everyone when he decided to replace Francisco Sa, an experienced but slow player (with 33 years old) by younger and faster José Luis Tesare. He also put three attacking players (resulting in a 4–3–3 formation), something infrequent by those times. 
The plan designed by Lorenzo was a real aim so Boca Juniors scored three goals for a 3–0 (Felman, Mastrángelo and Salinas) at the end of first half. Nevertheless, during the first 15 minutes of the match Borussia played much better than Boca Juniors but the German match could not score a goal in despite their dominance over their rival.
One of the key players of the match was Darío Felman, who also scored a goal. Felman, on loan to Valencia CF by then, had not attend the first game in La Bombonera but Alberto J. Armando convinced him to play the second leg. Felman gave Ernesto Mastrangelo a precise pass to score the second goal of the match.
At the end of the match, Borussia manager, Udo Lattek stated that "Boca Juniors was a more mature and intelligent team than us".
Aftermath.
Boca Juniors's victory was acclaimed throughout Argentina, even by supporters of rival clubs. It was the first intercontinental title for the club and the third for a "big five" club of Argentina after the victories of Racing and Independiente in 1967 and 1973 respectively.
After their return from Germany, Boca Juniors players went directly to the club so they had to play Newell's Old Boys in the Metropolitano tournament, which would be finally won by Quilmes.
References.
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