Dortmund captain Mario Gotze's first-half penalty was the difference between the two sides.
Pep Guardiola's Manchester City started their pre-season campaign with a defeat as Borussia Dortmund beat the Premier League champions 1-0 in the International Champions Cup at Soldier Field in Chicago.
Dortmund captain Mario Gotze's first-half penalty was the difference between the two sides.
Guardiola fielded an inexperienced and young team that featured Riyad Mahrez and Leroy Sane as the only known names. Mahrez, the $75 million signing from Leicester, made his debut and was City's best player. Joe Hart, the former England keeper, also made his first City appearance since August 2016 in the second half.
Gotze scored in the 28th minute after Christian Pulisic was brough down in the box. Alex Zinchenko, who is set to leave the club before the start of the English domestic season, brought down the lively Pulisic and Gotze beat Bravo from the spot
Alexander Isak almost made it two soon after.
Jack Harrison should have done better just before the interval when he miscued a shot from close range and them Mahrez forced a great save from Dortmund keeper Marwin Hitz.
Nevertheless, Guardiola would have been all too aware of his side's lack of killer instinct.
Former Etihad starlet Jadon Sancho, who quit the Premier League club for Dortmund last August following a fall-out with Guardiola, was introduced in the second half and began promisingly.
Joe Hart, the former England keeper, was making his first City appearance since August 2016 but it was opposite number Hitz who was almost beaten on 55 minutes when another Mahrez set-piece flew just past the post.
The Algerian's cute pass set Lukas Nmecha through on 70 minutes but his finish was lacking before Hart produced an excellent point blank save to deny Mahmoud Dahoud.
Dortmund, however, held firm to seal a deserved win.
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 "Borussia Dortmund v/s Manchester City")
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