Juan José "J. J." López, is an Argentine football manager and former player, who played as a midfielder. López spent the most part of his career in River Plate, where he won 7 titles. With Argentinos Juniors, where he played in the 1980s, López won four titles, including one Copa Libertadores.

Asociación Atlética Argentinos Juniors is an Argentine sports club based in La Paternal, Buenos Aires. The club is mostly known for its football team, which currently plays in the Argentine Primera División, and was recognized as one of the most important football teams of South America by FIFA. It is one of the eight Argentine first division teams that have won the Copa Libertadores. The continental trophy was won in the club's first entry to the contest, in 1985. The most remarkable sign of this team is the power of its youth teams, which unveiled some of the most talented footballers in Argentine football history, with Diego Maradona as the greatest example of all. As a result, it has been described as "one of Argentina's most distinctive football clubs".