Wolves boss Mick McCarthy admits the fitness of Red Star Belgrade loan midfielder Segundo Castillo is a mystery.
McCarthy told the Birmingham Mail: "We don't really know how much action he's had because he came here after pre-season and played a couple of games."
The Yorkshireman admitted a language barrier with his star midfielder.
"It was difficult to have that conversation with him because his English isn't great and I speak little or no Ecuadorian," he quipped.
"But he said he was fine and he looked good. Against Sunderland he was great in the first half. It has all quite clearly taken its toll, however."