In Creed II we see Rocky visit Adonis in the hospital, where he’s basically thrown out by a frustrated Adonis.
Rocky stops them from going to Adonis’ room, but it results in Rocky and Ivan getting into a fist fight.
According to Sylvester Stallone’s Instagram post, this scene would have taken place after the first fight between Michael B. Jordan’s Adonis Creed and Florian Munteanu’s Viktor Drago.
It seems that originally there was a scene where Rocky, as he left the hospital would meet up with the Dragos and the fight promoter who have brought a camera crew with them to harass Creed.