Cilic told The Tennis Space: "I was surprised when I heard that the police were getting involved because what happened on the court wasn't intentional.
"I mean, of course, it was just a reaction, but it ended up being quite tough for him finishing the match like that being defaulted. And then to confront this, with the police, that's pretty bad.
"I think it's an overreaction for the police to be involved. I don't really want to judge but he wasn't trying to do that intentionally, as he knew that if he did that he would be defaulted. I don't think he was trying to do anything like that."
Nalbandian has apologised for the incident and said that he hopes to compete at the event next year.