But Bayer only want to spend a modest portion of the €120m they received for Havertz and Volland.
The clubs are now haggling a fee with the expectation being that they will settle at around €10m.
Leverkusen are also close to an agreement with Kolasinac over personal terms.
Kolasinac’s Arsenal salary is too high for Bayer, so they want to absorb it over a longer contract period.
Before signing Kolasinac, Leverkusen would like to sell a defender, with Jonathan Tah and Wendel candidates.
Due to the Coronavirus pandemic, the Bundesliga side are being careful about how much money is spent.