Nick Kyrgios throws tantrum in Cincinnati, calls Irish umpire a potato

Australian bad boy Nick Kyrgios is facing heavy sanctions after an explosive meltdown at the Cincinnati Masters today.

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The 24-year-old Australian took aim at chair umpire Fergus Murphy, carrying out constant verbal abuse against the Irishman. Source: 1 NEWS

The 24-year-old took aim at chair umpire Fergus Murphy, claiming he was unfairly calling him for a slow service game.

Kyrgios carried out constant verbal abuse against the Irishman, calling him a potato and the worst umpire in the world.

The Aussie followed that up by taking a toilet break despite Murphy declining his request and subsequently smashing two racquets in a tantrum in the tunnel captured by cameras.

Ironically, it was a double fault from Kyrgios handing Russian eighth seed Karen Khachenov the match.

Kyrgios marking the end of the match by calling Murphy a “f------ tool” and spitting as he headed the chair umpire's way.

Kyrgios is still expected to be seeded for the US Open in just under a fortnight, although he's likely to cop some serious fines.