Borussia Dortmund winger Christian Pulisic is set for around three to four weeks on the sidelines after suffering a muscular issue whilst playing for USA during the international break.
The American, who signed with Chelsea for £58m in January but was loaned back to Dortmund until the end of the 2018/19 season, became the youngest player in USA history to reach 10 goals for the side, with a fourth minute score against Chile in just his 25th cap.
However, 32 minutes later he was forced to come off with a suspected pulled muscle.
Speaking ahead of his side's clash with Wolfsburg this weekend, Lucien Favre confirmed the American was set for a spell on the sidelines.
As quoted by the club's official twitter account, Favre explained: "The boys have come back fit from the international break. Only Pulisic, unfortunately, has returned with a pulled muscle in his leg."
According to ESPN, he later added: "He will definitely not play."
While the boss refused to comment on whether he would be fit for the potentially title-deciding fixture with Bayern Munich, a source close to the team told the publication that the player would be out for around three to four weeks.
However, there was some positive news for BVB, as Favre revealed: "[Mario] Götze, [Paco] Alcácer, and [Axel] Witsel have all been training since last Thursday and we hope to have them fit for Saturday."
Turning his attentions to Saturday's opponents, the coach admitted: "Wolfsburg is a very athletic team, They often change their formations, switching between a 4-3-3 and 4-4-2, we have to be prepared for everything."
But sporting director Michael Zorc was optimistic about Dortmund's chances heading into the clash and the final rounds of the league, affirming: "The team is showing that they absolutely want to win."