Romelu Lukaku and Roberto Gagliardini are both in the squad to face Viktoria Plzen in the Champions League, but Marcelo Brozovic is out.
It kicks off at San Siro on Wednesday at 17.45 UK time (16.45 GMT).
The Nerazzurri would book their place in the Round of 16 with a victory, sending Barcelona into the Europa League.
Coach Simone Inzaghi already said in his press conference that Lukaku was ready to make his comeback after almost two months out with a muscular strain.
Sky Sport Italia now confirm that the Belgium international and midfielder Gagliardini are both in the squad for tomorrow’s crucial match.
The 29-year-old centre-forward has not featured at all in the Champions League this season, as he was ruled out since picking up the thigh injury during training on August 29.
He still managed to contribute a goal and an assist in those three Serie A appearances since the loan move from Chelsea.
Only Brozovic has left the training camp this evening to spend the night at home, as the others remain at Appiano Gentile to prepare for this test.