How did Andy respond, what did he say?
Murray was sympathetic towards Karlovic, but said it was an issue that could only be resolved by analysing television pictures.
"(It is) impossible for me to say whether they were foot-faults or not," he said.
"You can only look on the TV. And if he wasn't foot-faulting then he has a right to be upset, because there was a lot of them. But if he was, then you can't do it. It's not allowed.
"I can't really comment on it unless I see it. I don't know what they were saying on the TV. They must have had some pretty clear images of it."