Oscar's contribution was curtailed when he was hurt making a tackle on Bonucci, who appeared to stand on him as he landed.
Di Matteo endorsed calls for UEFA to examine video footage of the "bad tackle", criticising the performance of referee Pedro Proenca.
"The referee tonight did do nothing about many challenges. The game has finished now for us.
"If UEFA has a look then good. But we have to move on from it."
He added of Oscar: "We will have to assess him tomorrow morning but he got a knock on his ankle."