Christian Pulisic has been ruled out of Borussia Dortmund's Champions League clash with Monaco on Wednesday after sustaining a calf injury.
The 20-year-old featured in his side's 4-2 win over Bayer Leverkusen at the weekend, but the club has since revealed that the American has torn fibres in his calf.
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In a statement on their website, the club also said that he is a doubt for the visit of Augsburg on Saturday.
Dortmund are level on three points with Atletico Madrid at the summit of Group A thanks to an opening win over Club Brugge courtesy of Pulisic's solitary goal.
