In fact, Chiellini is the one who's closing in on a return, as he could be available for the game against Frosinone, which will be played five days prior to the Atleti game. 

 

There is also optimism in regards to the situation of Bonucci, who just might make it back in time before the important game. However, should he not make it, then Rugani will play alongside Chiellini.