Nantes president Waldemar Kita has warned Aston Villa not to mess them about.
Kita is upset with Villa for attempting to talk down an agreed €5 million fee over midfielder Jordan Veretout.
"They (Aston Villa) quibble over details. They should be careful because if they continue to quibble, he will pass by under their nose.
"They have until tomorrow (tonight) to make a decision," said Kita.
Leicester City's offer of €9 million remains on the table.