BORUSSIA DORTMUND captain Marco Reus has been ruled out for up to four weeks with a muscle injury, according to a club statement.
The German forward was taken off late on in his side's 3-2 DFB Cup defeat to Werder Bremen last night.
The injury means Reus, 30, will miss the first leg of Dortmund's Champions League last-16 clash with Paris Saint-Germain.
Team-mate Julian Brandt tweeted his support: "@Woodyinho, get fit quickly."
Reus' time at boyhood club Dortmund, whom he joined in 2012, has been laden with injuries.
But the Germany international has been enjoying one of his best-ever spells in a black and yellow shirt, missing only one league game this season, scoring 11 goals and recording six assists in 19 Bundesliga appearances.
But the latest setback means he will be unavailable for his side's biggest game of the season against PSG on February 18, and he faces a race against time to be fully fit for the return leg at the Parc des Princes on March 11.
Fortunately for Lucien Favre's side they will be able to call upon free-scoring 19-year-old Erling Haaland after the Norwegian wonderkind made it eight goals from four games in German football in the defeat to Bremen.
PSG head into the tie as favourites but have issues of their own to sort out before they meet Jadon Sancho & Co.
Kylian Mbappe seemed to fall out with manager Thomas Tuchel after being substituted in the French champions' 5-0 win over Montpellier at the weekend and a meeting between the pair was arranged on Sunday morning by sporting director Leonardo to clear the air.
Meanwhile, Brazilian superstar Neymar was ruled out of PSG's win at Nantes last night with a rib injury - just two days after his 28th birthday party.
Dortmund take on the French champions at Signal Iduna Park on February 18 at 8pm GMT.