Both Premier League clubs have had the dead-ball specialist watched this season and have been impressed by his performances for both club and country.
Leverkusen are desperate to hang onto their star man, who has been hailed as the ‘New Ozil’, despite the interest from England as well as Barcelona and Atletico Madrid.
But now Schade has admitted for the first time that the Bundesliga side might have no option but to sell the 21-year-old midfielder.
He told Bild: “We want to keep Hakan, but with us there is a pain threshold.”
It has been suggested that a fee of £29m would be enough for Leverkusen to sell. And, when asked about the reported interest from England, Schade added: “I see that and I am calm and relaxed.”