The Belgian side have confirmed de Bruyne will undergo a medical on Monday.
Chelsea boss Andre Villas-Boas has said the club made the £6.7million bid for De Bruyne due to ‘club policy’.
Villas-Boas said: “He’s a player the club has scouted for some time. I’m a manager who respects club policy.
“A club has to look to the future, whether it’s with this manager or another. He’s a good bet for the future.”
