An MRI examination caused certainty and relief: Sow has not hurt harder.
According to a club speaker, the Swiss national player moved into a torrent in the knee.
There is even hope that the 25-year-old can contribute on Thursday (21 clock, live! At Camp Nou) in the second leg in FC Barcelona.
That would be very important for the Hesse, because the midfielder not only impresses with enormous runner qualities, but is also predestined thanks to his footballing skills to play balls precisely behind the lines.
On the fast switching game to ball gains will also arrive on Thursday at Camp Nou.
Should not be fit in time, the team is likely to be called the Sebastian Rode and Kristijan Jakic on the double sect.
Safe is missing Tuta, which in the first leg a deep yellow-red card insert.
For the central defender, Almamy Toure is expected to jump into the breach.