Borussia Dortmund have lost Youssoufa Moukoko for their Champions League clash with Chelsea.

BVB have announced an ankle injury was suffered by the attacker against Werder Bremen on Saturday.

Dortmund say they expect Moukoko to sit out for six weeks.

As a result, he misses both legs against Chelsea in the Champions League round of 16 as well as several matches in the Bundesliga.

Moukoko has six goals in 18 games in the Bundesliga this season and also made his debut for Germany at the World Cup.