Lille want a decision today from Thiago Maia about his transfer plans.
The Brazilian midfielder has two offers on the table, reports Le 10 Sport, from Newcastle United and Genoa.
Genoa have bid €7m for Maia plus 50 per cent of his sell-on fee.
Newcastle, meanwhile, have proposed a loan with a superior salary offer for the player's consideration.
Lille coach Christophe Galtier fears losing Maia and has already asked management to identify a replacement.