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.
|Halep to meet Bertens in Cincinnati final|
|Frampton set for Warrington fight after dominant Windsor Park win|
|Messi makes LaLiga history with Barcelona´s 6000th goal|
|MC Alger defeat throws quarter-final chase wide open|
|Barcelona 3 Deportivo Alaves 0: Messi´s milestone goal sets up victory|
|Djokovic on course for Masters 1000 history after Cilic victory|
|It´s on! - Wilder fight confirmed after Fury defeats Pianeta|
|Like Cruyff before him, Guardiola favouring Foden´s style over substance|
|Ronaldo tweets debut delight after Juve win|
|Chelsea are not title contenders yet, claims Sarri|
|Bayern Munich boss Kovac planning for Boateng stay|
|Championship Review: West Brom crush QPR as Leeds stay perfect|
|Allegri pleased with Ronaldo despite goalless Juventus debut|
|Chelsea can produce magic with Sarri in charge - Hazard|
|Emery ´happy without the result´ as Arsenal comeback falls short|
|Gordon confirms Cleveland Browns return|
|Eight shots and only 30 passes - Ronaldo´s Juventus debut in Opta numbers|
|Cristiano Ronaldo´s debuts: Best impressed, scoring a penalty & a blank for Juventus|
|Old boy Escare haunts Catalans in big Wigan win|
|Preston North End 2 Stoke City 2: Super sub Crouch salvages a point|
|Pochettino vows not to discuss Alderweireld future before five-minute answer|
|Waring, Aiken lead the way as Olesen stays in the hunt|
|Linking play, forcing saves and clashing with goalkeeper - Cristiano Ronaldo´s Juventus debut|
|Chelsea 3 Arsenal 2: Alonso snatches win after Gunners comeback|
|West Ham still haunted by last season - Pellegrini|
|Puel defends Vardy after Wolves red card|
|Chievo 2 Juventus 3: Ronaldo´s debut ends in dramatic win|
|Mbappe: Neymar is Paris Saint-Germain´s superstar|
|Pickford should have seen red - Hughes fumes over challenge on Ings|
|Kohli and Rahane star as India edge day one|
|AC Milan´s Strinic sidelined by heart problem|
|Kane happy to banish August goal hoodoo|
|Guingamp 1 Paris Saint-Germain 3: Mbappe returns to inspire comeback|
|Springboks´ second-half revival punishes Pumas|
|Finally! Kane scores a Premier League goal in August|
|Warnock enjoyed ´poetic justice´ of Kenedy´s penalty woe|
|Holders Eintracht Frankfurt stunned by Ulm in DFB-Pokal|
|West Ham 1 Bournemouth 2: Wilson, Cook condemn Hammers to successive losses|
|Tottenham 3 Fulham 1: Trippier and Kane help Spurs avoid Wembley wobble|
|Leicester City 2 Wolves 0: Lucky Foxes win despite Vardy red card|
|Everton 2 Southampton 1: Richarlison continues fine start|
|Drochtersen/Assel 0 Bayern Munich 1: Lewandowski spares Bayern´s blushes|
|Violent hack, no passes, missed penalty - Kenedy´s Cardiff nightmare|
|Ronaldo handed Juventus debut against Chievo|
|Cheika and Hooper frustrated by second-half slump|
|Hansen issues warning after All Blacks win Wallabies ´prizefight´|
|Stuttgart stay good for Pavard, says Reschke|
|You can´t buy class - United boss Mourinho blasts City documentary|
|Cardiff City 0 Newcastle United 0: Penalty miss rounds off abject day for Kenedy|
|Lopetegui open to rotating Real Madrid goalkeepers|
|´World´s best´ Alisson will be difficult to replace, says Roma boss Di Francesco|
|Dragons and Sharks pounce on Panthers after four get sin-binned|
|AC Milan situation has proved FFP works - UEFA president Ceferin|
|Marseille´s Garcia uninterested in striker despite Balotelli link|
|Goodhue sparkles on debut as All Blacks thump Wallabies|
|I feel like chicken tonight - Saunders game for a laugh after Wilder fowl play|
|Aubameyang-Lacazette partnership possible for Arsenal|
|Pant handed debut as India ring changes at Trent Bridge|
|Pochettino pledges to protect Kane|
|Federer relieved to ´hang tough´ in Cincinnati|
|De Bruyne injury: Can Foden or Diaz replace Man City playmaker?|
|Furyk confident as Team USA takes shape|
|Neymar´s behaviour deserves praise, Tite claims|
|Scherzer, Harper lead Nationals past Marlins|
|Djokovic and Federer join Cilic, Goffin in Cincinnati semis|
|Federer outlasts recovering Wawrinka|
|WATCH: Djokovic wins match, loses car|
|Bolt arrives in Sydney for A-League trial|
|Red-hot Bertens beats Svitolina, Halep marches on|
|Snedeker preserves Wyndham lead|