Barcelona's new signing Raphinha scored the only goal as Barcelona beat Real Madrid in Las Vegas on Saturday night.
The Brazil international joined the La Liga giants from Leeds United in a deal worth up to £55m earlier this month.
He has now scored two goals in two pre-season games in the United States.
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His goal came in the 27th minute after he intercepted a wayward pass from Real's Eder Militao to secure the win in a match in which Robert Lewandowski made his debut for Barca.
Real Madrid, who were without star striker Karim Benzema, failed to register a shot on target.