According to Calciomercato, the day after Juventus drew 1-1 with Milan, Locatelli developed discomfort in his right knee.

The report states that Locatelli felt discomfort on the outside of his right knee last night, and Juventus' medical staff are concerned about the situation.
Cambiaso, Papessal and McKennie are still training individually, with all three waiting to rejoin full team training.