Tottenham could be sued if they attempt to sign Manor Solomon on a free transfer.
The North London club are aiming to secure the Shakhtar Donetsk star on the cheap this summer.
Solomon, who is an Israeli winger, spent the past season on loan at Fulham after his contract with Shakhtar was suspended.
Their chief executive Sergei Palkin said the following about the situation to ESPN: I contacted Solomon and his agent and invited him back to our club. I said: 'you can play all the games in Champions League, you will be in the starting eleven' but he doesn't want to move and I believe he will stay in England.
Where he will go? I don't know. In any case, if you go to Tottenham, we will deal with Tottenham in court in this case. Everything comes to a simple situation: it sounds like unjust enrichment. Can you imagine, we pay big money for this player and finally Tottenham receives him for free? It is not fair in respect of our club. We will definitely go to court and we will fight for ourselves."
He added: I would like to send a message to those clubs who are trying to sign our players without paying a transfer fee: Shakhtar will file claims for unjust enrichment against players or clubs who have enriched themselves and benefitted by obtaining a financial advantage."