British media DaveOCKOP, which mainly reports on Liverpool news, is expected to negotiate Guy's transfer this week.
The player is a key signing target for the defensive line and Liverpool has made most of the preparations for this potential transfer.
If you leave Crystal Palace, Guy only wants to join Liverpool.
25-year-old Guy has one year left in his current contract. The player has 3 goals and 2 assists in 44 games last season, and the Germans turn around and priced at 45 million euros.