Leganes coach Mauricio Pellegrino says Andriy Lunin will face Alaves this weekend.
Lunin is on-loan at Leganes this season from Real Madrid.
Leganes No1 Ivan Cuellar is currently injured and will miss the game.
"The goalkeeper is going to be Lunin. He has arrived well, he has worked with the team, played with Ukraine the other day," said Pellegrino.
"He will be the goalkeeper from the start."