South Africa have beaten New Zealand by six-wickets in fifth and final one-dayer at Eden Park.
Du Plessis guided the South Africa to finished unbeaten on 51 as the Proteas made 150-4 after they bowled the Black Caps out for a disappointing 149 in 41.1 overs.
The result means the world’s number one One Day team won the series 3-2 series victory.
New Zealand looked in the game when they had South Africa 88-4 when they captured the important wicket of AB de Villiers. However, Du Plessis then guided the team home from there.
New Zealand were never able to settle against a superb South African bowling attack when they batted.
Kagiso Rabada, South Africa’s main bowler, bowled Martin Guptill for four and from then on it was a constant stream of New Zealand batsmen heading back to the pavilion, with six falling for single figures.
The only resistance came from opening batsman Dean Brownlie (24) and the middle order of Jimmy Neesham (24), Mitchell Santner (24) and Colin de Grandhomme (32), who was the last man out on the first ball of the 42nd over.
The two sides now head to Dunedin for the first match of the three-Test series, starting on March 8.