Lukaku's agent responded by saying any deal would not be done quickly and that the player would be returning for pre-season later this month.
He also denied reports that the Lukaku deal was dependent on Anderlecht getting Genk starlet Kevin de Bruyne as part of the deal.
"As for the scenario with Kevin de Bruyne it's rubbish, never has there been a question of incorporating him in the Lukaku deal."
Henrotay admits the prospective size of the fee for Lukaku means nothing will be done quickly.
"Anderlecht want a lot of money for Lukaku, he costs more than two million you know - it will take more time.
"With the current state of things, Romelu will resume training on June 24 with Anderlecht."
"Sure he will leave," he told the Gazet van Antwerpen.
"And his departure is crucial to our transfers.
"I do not know if it will be Chelsea, there are many big clubs interested and we are negotiating.
"One thing is certain, he will not spend another year with Anderlecht."