Guardiola's Man City get off to a losing start in Chicago
Mario Götze scored the only goal of the game from the penalty spot to hand Borussia Dortmund all three points in the tournament's opening game on Soldier Field.
CHICAGO, IL - JULY 20: Borussia Dortmund react after leading at the half against the Manchester City during an International Champions Cup match at Soldier Field on July 20, 2018 in Chicago, Illinois. Elsa/Getty Images/AFP
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