CHICAGO, ILLINOIS -- Mario Gotze's first-half penalty proved the difference as Borussia Dortmund kicked off the International Champions Cup with a 1-0 victory over Premier League champions Manchester City.
City's record signing Riyad Mahrez made his debut following his £60 million move from Leicester City and almost grabbed his first goal with a wicked free kick just before half-time. His 20-yard strike deflected off Sebastian Rode only for Dortmund keeper Marwin Hitz to brilliantly tip the ball over the bar.
Pep Guardiola was forced to field a makeshift line-up with plenty of youngsters and players who spent last season out on loan, with 16 senior players still to join up for preseason after playing at the World Cup.