Shakhtar boss Mircea Lucescu has warned Chelsea would be made to pay for failing to appreciate Willian's "true value" ahead of Tuesday's game.
Lucescu accused the European champions of making a derisory bid for the Brazil playmaker, who they tried to buy in January and reportedly made another attempt to sign this summer.
Shakhtar were said to have snubbed a ?16.7million offer at the start of 2012 and one in the region of ?27million after the Blues were crowned kings of Europe.
Lucescu, who admitted he had given Willian assurances he could move to Stamford Bridge, said: "Willian was far away from Chelsea.
"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."
Lucescu also confirmed Chelsea had b...