Australia captain Steve Smith handed 30 per cent fine

Australia captain Steve Smith has been docked 30 per cent of his match fee for his actions following an unsuccessful review on the fourth day of the second Test with New Zealand.

Smith called for a review after seeing Josh Hazlewood's lbw appeal against Kane Williamson denied during Tuesday's morning session.

Richard Illingworth, the third umpire, ruled the ball struck Williamson's bat before going on to hit his pad and upheld the decision on the field.

That prompted a furious reaction from Smith and Hazlewood, who was heard by the stump mic to have said "What? It hit his foot ... who the f*** is third umpire?" in an exchange with umpire Ranmore Martinesz.

Hazlewood was later fined 15 per cent of his match fee and a heavier penalty has been levied against Smith, whose side went on to complete a seven-wicket win in Christchurch on Wednesday, clinching a 2-0 series victory.

An International Cricket Council (ICC) statement read: "Australia captain Steve Smith has been fined 30 per cent of his match fee for breaching Level 1 of the ICC Code of Conduct during the second Test against New Zealand in Christchurch on Tuesday.

"The player was found to have breached Article 2.1.5 of the ICC Code of Conduct for Players and Player Support Personnel, which relates to "showing dissent at an umpire's decision during an international match".

"Following the conclusion of the match on Wednesday, Smith admitted the offence and accepted the sanction proposed by Chris Broad of the Elite Panel of ICC Match Referees. As such, there was no need for a formal hearing."