Four years later, Lanús returned to Primera after winning the promotion tournament. Once more, the team remained a very short time in Primera so Lanús was relegated after the 1977 season. Lanús was relegated after a controversial decision by penalty kicks in a match against Platense. After 20 penalties shot by all outfield players, it was the goalkeepers' turn. The Lanús goalkeeper shot first, but missed. It was the Platense goalkeeper's turn, but instead, Platense striker Miguel Ángel Juárez took it, breaking the rules. The referee allowed the goal, and Lanús were relegated illegitimately. The club reclaimed, but the Argentine football association did not respond.