London. Arsenal, returning to their home ground Emirates Stadium for the first time after becoming Premier League champions, has been defeated in the Emirates Cup. The team was stunned by Borussia Dortmund with a 3-2 goal difference.In the match, Samuel Innacio gave Dortmund an early lead with an excellent finish. Then Konstantino Karetsas scored to double the team's lead. For Arsenal, substitute player Ethan Nwaneri scored a goal from an excellent pass by Christos Jolis. Dortmund's Joane Gado added the third goal by utilizing a corner ball. Later, Victor Gyokeres scored from a penalty awarded after a foul on Jolis, bringing Arsenal...