Arsenal won 4-1 on penalties after a 1-1 draw in regulation time on Sunday, Thibaut Courtois and Alvaro Morata crucially missing the spot-kicks.
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Sanchez, whose future has been subject of huge speculation throughout the transfer window, was not fit to play in the match after returning later than the majority of his team-mates due to his involvement in the Confederations Cup.
But he made a point of acknowledging Arsenal supporters after congratulating his team-mates on their victory.
Watch that and Arsenal’s trophy lift below…
