The incident happened in the Round-of-16 tie, while trailing 5-6 to opponent and eventual beneficiary, Pablo Carreño Busta.

The 33-year-old top seed headed straight for his car afterwards.

Pablo Busta's reaction:

"I was celebrating the break with my coach," he told reporters.

"When I heard that the line judge was on the floor I was in shock. I never expected this moment when playing Novak.

Carreno Busta added that the incident was "unintentional."

"I think it was bad luck," he said.