2) Konstantinos Karetsas
Karetsas certainly knew how to make a successful first impression with Dortmund fans. The 18-year-old Greek international, who arrived at the Signal Iduna Park from Belgian outfit KRC Genk, made his arrival felt with an incredible curler from the edge of the box to make it 2-0 for Dortmund towards the end of the first half.
Karetsas was also involved in the build-up play of Dortmund's first goal, dragging Riccardo Calafiori with him down the wing to open up space for Fabio Silva. Despite being the first starter to go off the field in this game, Karetsas showed flashes of the potential that made Dortmund pay big money for him this summer.
3) Samuele Inácio
The Italian did not have too many chances this afternoon, but he caught the eye whenever he got onto the ball. Inácio made several dangerous attacking runs for Dortmund, none more important than his incisive drive into the Arsenal penalty area to tuck away the first goal of the afternoon. Look for the freshly-minted senior Italian international to be a key player in Dortmund's rotation plans this season.
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