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Say what you want about the Austria side that lined up against the United States, but they showed plenty of quality, especially in their attack.
Arnautovic showed why Stoke City splurged some September cash on him and why he is starting ahead of Brek Shea for the Potters with his performance in front of his home fans at the Ernst Happel Stadion.
Austria's starting forward, Marc Janko, gave the center-back pairing of Omar Gonzalez and John Brooks fits for most of the first half, and he was rewarded with the lone goal of the match in the 33rd minute.
The host side on Tuesday also featured a world-class player in an unfamiliar position, which sounds all too familiar given the positioning of the United States, in David Alaba.
Alaba lined up in the central midfield for his county instead of the left-back spot that he occupies for Bayern Munich.
If they had not been in a group with Germany and Sweden during UEFA World Cup qualifying, Austria may have been playing in a match with more meaning on Tuesday.