Nick Kyrgios slammed with heavy fine by ATP after Cincinnati outburst

Nick Kyrgios is in hot water after his fiery antics in Cincinnati

Nick Kyrgios is in hot water after his fiery antics in Cincinnati

Kyrgios could be facing suspension after he spat the dummy during his second-round match at the Cincinnati Masters.

Kyrgios accused Murphy of starting the shot clock too early and was ultimately issued a point penalty at the end of the second set tiebreak for insulting the Irish umpire using an expletive.

Kyrgios lost the match to Khachanov 7-6 (7/3), 6-7 (4/7), 2-6 after a third-set capitulation, but the result was only a very small part of the story.

He was given four $20,000 fines for unsportsmanlike conduct - another unsportsmanlike was docked $5,000 - and an additional $20,000 for verbal abuse.

It could mean the volatile 24-year-old's place at the upcoming US Open is at risk.

He continuously yelled abused at the chair umpire, calling him a "f****** tool", and smashed multiple rackets.

He also labelled the ref a "potato" and claimed he was the "worst ref in the world".

He called Murphy the "worst f****** referee ever" and added, "Every time I play he's doing some stupid s***".

With the crowd cheering for her, Williams recovered from a rough first set and beat Donna Vekic 2-6, 6-4, 6-3, her best stretch of tennis since capturing three consecutive matches in March at Miami.

During this break, Kyrgios would bring two racquets with him, smashing them in the corridor of the toilets before returning to the court.

The fuming Australian returned to the action as Murphy was heard talking into his walkie-talkie, saying: "He went to the bathroom with two rackets and came back with two broken rackets". "Get me some footage of Rafa playing that quick", he said, complaining that the multiple Grand Slam victor has been treated differently by umpires.

His latest fiery outburst comes just weeks after he was slammed for his bad boy behaviour at the Citi Open in Washington, with footage capturing him throwing a water bottle angrily at the umpire's chair.

In 2016 Kyrgios was given an eight-match suspension by the ATP for "conduct contrary to the integrity of the game" at the Shanghai Masters after he was deemed to not be trying in his second round defeat to Mischa Zverev of Germany.