This is the situation with yellow cards. Players get suspended after 3 yellows:
4 yellows: Marchisio
3 yellows: Chiellini
2 yellows: Vidal, Lichtsteiner
1 yellow: Pogba, Bonucci, Giovinco, Peluso
Chiellini served his suspension, as did Marchisio, who got one more yellow afterwards.
In other words, Vidal and Licht are a yellow away from suspension, while Marchisio, Pogba, Bonucci, Seba and Peluso are 2 yellows away from suspension.