Club-record signing Riyad Mahrez made his first appearance in Chicago, where Mario Gotze's penalty lifted Borussia Dortmund on Friday.
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.