Donyell Malen signed for Dortmund from PSV on a five year contract.
The 22 year-old striker has now trained with his new teammates for the first time and you can take a look at footage from his first session in the video above!
The Dutchman could make his competitive debut for his new club in the German Cup first round tie away to Wehen Wiesbaden on 7th August at 20:45 CEST.