London, Aug. 9 -- Premier League champions Arsenal's underwhelming pre-season run continued with a second successive loss to Borussia Dortmund as sub-par defending cost them the Emirates Cup on their home soil on Sunday.

Arsenal did try to come back from a deficit of 0-2 but a 58th minute strike from Joane Gadau helped Dortmund seal the win. Previously, they had registered a 3-1 loss to Real Betis after starting off the pre-season with a thumping 4-1 win over Girona.

Arsenal had plenty of chances throughout, with Viktor Gyokeres wasting his attempt in the first half as it hit the woodwork. Samuele Inacio (7th minute) and 18-year-old wonderkid Konstantinos Karetsas (29th minute) put the German side ahead.

In the second half, Ethan Nwane...