DORTMUND, GERMANY - AUGUST 19: Youssoufa Moukoko of Dortmund smiles prior to the B Juniors Bundesliga match between Borussia Dortmund and FC Viktoria Koeln on August 19, 2017 in Dortmund, Germany. (Photo by Lukas Schulze/Bongarts/Getty Images)
DORTMUND, GERMANY - AUGUST 19: Youssoufa Moukoko of Dortmund smiles prior to the B Juniors Bundesliga match between Borussia Dortmund and FC Viktoria Koeln on August 19, 2017 in Dortmund, Germany. (Photo by Lukas Schulze/Bongarts/Getty Images)