However, although he is hopeful that a deal can be concluded, the 25-year-old's representative Guy Vandermissen has claimed that no talks have taken place.
"We hope that there can be a deal and he can go to Liverpool," he said. "If you go from Sunderland to Liverpool, it is a big step forward. You have to make decisions at certain times."
It is believed that Mignolet will cost Liverpool around £11m.