The Blues have been heavily linked with the 18-year old Belgium international for a while now but it appears that things are on the move to get him to Stamford Bridge.
Anderlecht general manager Herman van Holsbeeck has revealed that he is in talks with the London club but said he was unsure when a deal would be struck.
"There is still a long way to go in the negotiations," he told Sky Sports.
"We are indeed negotiating with Chelsea, but there are other clubs we are talking to.
"It could happen in the next half hour, it could take until August 31 - that is football."