The European champions were keen on recruiting the Brazilian but did not pay the transfer fee that the Ukrainian giants wanted.
"Willian was far away from Chelsea," said Lucescu. "They didn't even get anywhere near to our requirements, having done nothing to make my promises to Willian come true.
"Speaking specifically about the amounts, they officially offered the sum for which we had bought him young.
"I would really like them to highly appreciate his true value tomorrow and realise that they made a big mistake."