"We are working really hard to try and move forward," Pellegrino said.
"Hopefully we can have some good news tomorrow, but still nothing has happened.
"We are confident. I think the player wants to come, to be part of our squad but the most important part of the negotiations are still there so we have to continue to work.
"We are looking for someone who can replace Charlie or the quality of Charlie.
"Obviously it is not the same player, but this is our target now.
"I don't know if he will be ready [for Brighton] because we have to test the player."