Mario Gotze scored the only goal of the game as Riyad Mahrez made his Manchester City debut in a 1-0 loss to Borussia Dortmund at the International Champions Cup.
Mahrez debuted in Chicago on Friday after completing a club-record £60million transfer from Leicester City earlier this month.
The Algeria star showed glimpses of his quality for the Premier League champions and he almost scored before half-time via a set-piece but undermanned City fell to Dortmund at Soldier Field.
Gotze – wearing the captain's armband – scored from the penalty spot in the 28th minute after Dortmund team-mate and United States star Christian Pulisic was fouled by Oleksandr Zinchenko.
The World Cup deprived the Chicago crowd of a host of stars, with Gabriel Jesus, Sergio Aguero, Kyle Walker, Danilo, Vincent Kompany, John Stones, Raheem Sterling, Ilkay Gundogan, Kevin De Bruyne, Fabian Delph, Bernardo Silva, David Silva, Benjamin Mendy, Fernandinho, Nicolas Otamendi and Ederson absent for the Premier League champions.
Pep Guardiola's City, however, still fielded Mahrez and Claudio Bravo, with Leroy Sane and Aymeric Laporte on the bench.
Bundesliga outfit Dortmund – who downed Austria Vienna 1-0 in Lucien Favre's bow last week – were also without the likes of Raphael Guerreiro, Shinji Kagawa, Roman Burki and new signings Thomas Delaney and Manuel Akanji, though Gotze and Pulisic took part.
City made a lively start as the English side – led by Mahrez – enjoyed some success down the left-hand side without really troubling Marwin Hitz.
Dortmund grew into the game as the half wore on and they hit the front approaching the half-hour mark.
Zinchenko was exposed by Pulisic, who received the ball and drew a foul from the Ukrainian utility inside the penalty area after Dortmund dispossessed City before Gotze converted the spot-kick.
City were caught out at the back again when Alexander Isak rounded Bravo but the Swede found the side netting from an acute angle moments later.
Debutant Mahrez almost equalised on the stroke of half-time but his free-kick was kept out by Hitz.
Joe Hart – who is seeking a permanent move away from the Etihad Stadium – replaced Bravo at the interval, while Dortmund changed all 10 outfield players for the second half.
Dortmund found the back of the net again in the second half but Max Philipp's effort was ruled out for offside, much to the relief of City.
Hart was called into action with 19 minutes remaining, the out-of-favour former England number one – who spent last season on loan at West Ham – denying Jadon Sancho.
|LeBron´s Lakers lose again, Magic stun Celtics|
|Bartomeu: No Barca return for Neymar, Valverde contracted until 2020|
|Simmons and ´stimulating´ 76ers in NBA Finals mix, says Longley|
|Falcons heap further misery on Giants|
|Vidic hails Ronaldo as ultimate professional ahead of Old Trafford return|
|Warriors´ Cousins nearing NBA return|
|Pogba can´t do the basics – Souness criticises Man United star|
|Messi absence big blow for Barca as Icardi talks up Inter|
|´You can´t cry, that´s true´ – Ronaldo responds to Isco|
|Bartomeu: Barca still competitive without Messi|
|Bills RB McCoy remains in concussion protocol|
|Raiders place Marshawn Lynch on IR|
|Emery calm over title talk after another Arsenal win|
|Green: Warriors have to clean up defensively|
|Mariners say Bolt talks ongoing amid reports contract offer was rejected|
|Proud captain Ozil revels in Arsenal´s ´sexy football´|
|Puel angry over Holding handball|
|Cilic breezes through in Basel, Anderson fights back|
|Ingram: Four-game ban better than we expected|
|Raiders send Cooper to Cowboys for first-round pick|
|Arsenal 3 Leicester City 1: Outstanding Ozil inspires comeback win|
|World Series 2018: Three reasons why the Dodgers will win|
|Yarmolenko out for six months after Achilles surgery|
|World Series 2018: Three reasons why the Red Sox will win|
|Ozil eclipses Klinsmann to become Premier League´s most prolific German|
|Allegri expecting Old Trafford battle against Mourinho´s United|
|Bertens feared she did not belong in Kerber clash|
|Returning Ronaldo expecting ´tough´ game against Manchester United|
|Cristiano Ronaldo confident of clearing his name amid rape allegation|
|Osaka looking to learn from losing start in Singapore|
|Kovac expects tough test against AEK Athens|
|Whyte gives Chisora deadline over rematch|
|Spartak Moscow sack Massimo Carrera|
|Atletico Madrid confirm fresh injury issue for Gimenez|
|Dolberg extends Ajax contract after Real Madrid links|
|Ronaldo an example for Lukaku to follow|
|Bertens battles back to blast past Kerber|
|Ramos apologises for training ground fracas|
|Raikkonen should take heed of Alonso misfortune as F1 career winds down|
|Guardiola wants Manchester City fans to push team to Champions League glory|
|Isco not interested in departed Ronaldo - he didn´t want to be here|
|World Series 2018: Three storylines to watch in Red Sox-Dodgers|
|Neymar focus bad for football - PSG´s Maxwell|
|Marco Ianni charged by FA over Jose Mourinho touchline row|
|Stephens sees off Osaka in see-saw Singapore battle|
|I´m happy at Manchester United - Mourinho dismisses Real Madrid reports|
|Semenya and Asher-Smith head IAAF Female World Athlete of the Year shortlist|
|Mandzukic to miss Manchester United trip|
|I turned down Manchester United to return to Juventus - Bonucci|
|Sanchez out of Manchester United´s clash with Juventus|
|Australia make Short work of run chase in T20 win|
|Brotherly g-love! Tommy Fury follows Tyson into the pros|
|Ozil´s international retirement can help Arsenal - Emery|
|If you sack Lopetegui, you have to sack us all – Isco|
|Lopetegui defiant amid Real Madrid sack reports|
|Sri Lanka spinner Herath to retire after Galle Test|
|Ronaldo returns for Old Trafford welcome amid disquieting noise|
|Garcia claims third Andalucia Valderrama Masters title|
|Ex-England international Waldrom retires|
|´Massive personality´ Hart can lift Burnley, says Kompany|
|Liverpool felt wrath of ´emotional´ Klopp, says Shaqiri|
|Reid: Jenkins capitalised on Kaepernick movement|
|Manchester United v Juventus: Ronaldo out to end dismal scoring record against Mourinho|
|Injured Ribery to miss Bayern´s clash with AEK|
|Wilshere would have stayed at Arsenal under Wenger|
|Mahomes stars again as Chiefs crush Bengals|
|Bolt must accept ´much less´ to join Mariners, says A-League chief|
|Klopp compares Liverpool to dog without favourite toy|
|Young leads Hawks to first win, Thunder fall in Westbrook´s return|
|Spalletti hits out at physical Milan – I had three players asking to be replaced|