Milan strikers Ante Rebic and Divock Origi are training separately from the group this morning, while Rade Krunic is back.
The Rossoneri host Dinamo Zagreb in the second match of the Champions League Group E tomorrow.
Stefano Pioli is short of options in attack with Zlatan Ibrahimovic, Origi and Rebic out of action.
However, the Rossoneri see Krunic return to training with the rest of the team so the ex-Empoli man could be available on Croatian soil tomorrow.
Milan’s training began at 11 am local time at Milanello (10 am UK). Directors Paolo Maldini and Ricky Massara are watching the Rossoneri from the sidelines.
As usual, on the eve of European fixtures, the first 15 minutes of the session are open to the media.