The South African cricket team has heeded coach Mickey Arthur's call and stepped up the intensity in the second one-day international against Zimbabwe in Centurion.

A career best 111 not out by JP Duminy propelled the Proteas to a commanding 331 for the loss of five wickets in their 50 overs. South Africa's performance in their 45-run victory on Sunday was lacklustre and Arthur urged the players to be more ruthless. Jacques Kallis took to his new role as opening batsman like a duck to water and immediately answered Arthur's call -- his first scoring stroke sailed over the ropes.

He and Graeme Smith -- who was dropped on four by Brendan Taylor off Christopher Mpofu, enjoyed a century opening stand -- Smith's contribution 53 off 46 deliveries that included seven fours and a six. After the dismissal of AB de Villiers for five -- bowled by Ray Price -- Kallis and JP Duminiy continued the onslaught.

Together they put on a further 78 runs, before Kallis was dismissed for 81 an uncharacteristic shot by the classy stroke player. Duminy scored a-run-a-ball half century and despite losing partners, raced to his maiden one-day international century off just 82 deliveries -- another milestone for one of South Africa's Players of the Year.

The Proteas made three changes to the side for the second one-day international against Zimbabwe in Centurion following a lack-lustre 45-run victory in Benoni on Sunday. Jacques Kallis, JP Duminy and Roelof van der Merwe return at the expense of Hashim Amla, Johan Botha and Dale Steyn. Zimbabwe won the toss and asked South Africa to bat in the team's final warm-up match ahead of the England series that starts on Friday.