Higuain played the last few minutes with a bandaged head after a collision with goalkeeper Gabriel.
“Gonzalo is having stitches, then they'll decide whether to take him to the hospital. He is conscious, answering questions in a clear way," the coach told Sky Sport Italia.
“At the end, we got ourselves get swept up in a battle that was not our style. We created many scoring opportunities and didn't take them, so there was a lack of determination and clinical edge. We also didn't control our lead well at all, so I didn't like any of that.
“Cristiano Ronaldo was tired both physically and mentally, so it wouldn't have helped him to make this journey and sit there. When a player expresses his fatigue, it was only right to give him a rest.
“The fact remains, we created 10 scoring opportunities and didn't finish them. I think we took it a bit easy in our finishing and after we took the lead, acting almost as if it was natural we'd win.
“I don't know if we were superficial as such, but we weren't as determined as we could've been. We shouldn't think that just because we create lots of chances, we'll automatically score and win."