Mateo Musacchio was left out of Villarreal’s pre-season friendly, fuelling reports of an imminent Milan move.
The defender was only in the stands for last night’s 1-0 win over Hospitalet.
Milan have had a series of meetings with Villarreal and Musacchio’s entourage in Ibiza.
According to Spanish newspaper AS, the Rossoneri are currently €5m below the asking price of €30m.
There are other options to consider too, amid reports Valencia called Milan to ask if they wanted Shkodran Mustafi instead.
Meanwhile, the Serie A side cannot make any big buys until Carlos Bacca has been sold.
The takeover by a Chinese conglomerate has still not been completed, so funds are limited.