Borussia Dortmund coach Jurgen Klopp is confident that Mats Hummels will recover quickly from the back injury which he picked up in Wednesday's Champions League defeat against Napoli.
The centre-back was forced to leave the pitch shortly before half-time due to a back problem, with the 46-year-old opting to bring on attacker Pierre-Emerick Aubameyang to take his place.
Though Hummels's match fitness for BVB's Bundesliga match away against Nurnberg is unclear, Klopp is hopeful that the Germany international will make his comeback shortly.
"Mats has received a blow to his back on the sciatic nerve," the BVB coach explained to reporters.
"He still has a lot of pain but I assume, however, that he will be better relatively quickly."
Dortmund sit top of the Bundesliga with 15 points from five games.