At the Dubai 500 semi final today, final set, 6-5, Rublev lost his head and screamed in the face of a line judge. Conversation below:

Here's the conversation between Rublev and the supervisor:

Supervisor: Andrey, this gentleman here spoke in Russian. He said...

Rublev: I spoke to him in English. I asked him how he didn't see it was out.

Supervisor to the line referee: Can you repeat what he said?

Line referee: You said to him, "You idiot. How did you not see it?"

Supervisor: This is a disqualification. He speaks like this – and he knows Russian.

Rublev: I didn't speak to him in Russian.

Supervisor to the line referee: Can you repeat?

Rublev: Are you serious? (To the line judge in Russian) Are you serious right now? I didn't even speak Russian.

Line referee: If I hadn't heard, I wouldn't have said anything.

Supervisor: He speaks Russian.

Rublev: But I didn't speak Russian.

Supervisor: This is a disqualification.

Rublev: What do you mean – disqualification? I swear, I didn't...

Supervisor to the line referee: Did he say "****ing moron"?

Rublev: I didn't say "****ing." What do you mean – "****ing"? I didn't say that! It's a huge lie! I swear – I didn't say that.

Supervisor: We'll have to review the footage. But this is a disqualification.

Rublev: How can you trust...

Supervisor: He speaks Russian.

Rublev: It can't be. No! You can't do this. Maybe check the cameras first, and then believe him? He could have made up anything. Maybe intentionally.

Rublev will be stripped of all prize money and earned points from the Dubai tournament.