West Ham and Lazio are still locked in talks over the final details of Felipe Anderson's transfer.
Gazzetta dello Sport says they are still some way off an agreement.
The talks have hit several problems over the last few days after an initial surge of progress.
President Claudio Lotito is a tough negotiator at the best of times and wants to make a big profit on the Brazilian forward. He is demanding £40 million plus 20 per cent of any future sale.
So far, West Ham are proposing £30 million plus bonuses and 20 per cent of the profit from his next transfer fee rather than 20 per cent of the total.