David Warner and Tim Southee have traded verbal barbs in the middle of the Perth Stadium pitch after the Black Caps quick fired off a loose throw at the stumps that struck Joe Burns.
Burns, batting out of his crease, bunted a forward defensive straight back to Southee, who then threw it straight back towards the stumps, striking Burns in the hand.
At the non-striker's end, Warner scolded Southee for crossing the line as the bowler walked back to his mark.
• Lockie Ferguson to make test debut for Black Caps in Perth
• Live updates: Black Caps v Australia, day one of the first test in Perth
• Trent Boult reportedly ruled out of opening test match against Australia
• Black Caps captain Kane Williamson responsible for 'cricket porn'
Southee defended his actions by saying he was trying to run Burns out.
The exchange could be heard from the stump microphones.
As the crowd booed the Kiwi, Warner was heard saying: "C'mon mate".
Southee then explained: "He (Burns) was out (of his crease)".
Warner shot back: "But you hit his hand".
Southee shrugged it off: " Well he was in front of the wicket".
It only angered Warner more.
"C'mon, you're supposed to be Mr Nice Guy," Warner said.
Former Aussie captain Ricky Ponting said it was clear from the heated exchange that the battle will rage during this series.
"I tell you what the Aussies will notice - there was no apology, either," Ponting told Channel 7.
"He didn't say sorry at all."
Kiwi legend Brendon McCullum defended Southee, by suggesting his throw slipped from his fingers and he didn't intend to strike Burns.
"I think it's gone horribly wrong, I think it's caught in his fingers," McCullum said.
"David Warner didn't miss him anyway."