As reported a few days ago in the last match Zlatan Ibrahimovic received a yellow card after Civelli kissed Ibrahimovic. Here is the video showing the incident:
You can see clearly how Civelli comes close to Zlatan Ibrahimovic and puts his mouth against him. When Zlatan gets tired from it he simply pushes Civelli away. For some reason the referee then decided to give Zlatan Ibrahimovic a yellow card.