What was the longest penalty shootout in football history?

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Qual foi a disputa de pênaltis mais longa da história do futebol?This week, Athletico Paranaense and Internacional decided to qualify for the quarter-finals of the Copa Libertadores on penalties and there were two different results. The biggest duel was between Inter and River Plate with 20 shots. In the end, Colorado won 9–8, but the match is nowhere near the longest penalty shootout in football history.