De Kock's second successive century in WC set-up the victory for South Africa as they handed Australia a 134-run loss, their biggest-ever in WC history, at Lucknow on Thursday.
A century from De Kock and fantastic bowling spells from Kagiso Rabada, Keshav Maharaj and Marco Jansen helped South Africa defeat Australia by 134 runs and inflict on the five-time champions their biggest-ever WC loss.
South Africa's comprehensive performance, led by stellar contributions from Quinton de Kock and Aiden Markram, as well as impressive bowling spells by Kagiso Rabada and Keshav Maharaj, propelled them to a 134-run victory over Australia in their ICC Cricket World Cup match held in Lucknow on
Following a 102-run defeat against South Africa, Sri Lankan skipper Dasun Shanaka their bowlers missed the line and lengths and did not execute plans well in the first game.
South Africa kicked off their World Cup campaign with style as their opposition Sri Lanka succumbed at 326, way before the required target of 429 at the Arun Jaitley Stadium on Saturday.
In the post-match presentation, Marsh said, "That's the definition of a tough day at the office. Klaasen was just amazing today. It was a tough day. We were put under a lot of pressure towards the back end there."
Australia are waiting to see whether Head will be fit in time to play at the World Cup as head coach Andrew McDonald confirmed after the game that the left-hander had picked up a fracture.
de Kock has decided to retire from the ODI format at the end of the World Cup, as confirmed by Cricket South Africa (CSA) in their squad announcement release.
Skipper Temba Bavuma, David Miller, Aiden Markram, Anrich Nortje, Keshav Maharaj were among the players who were seen rocking the jersey in a video posted by Cricket South Africa (CSA).
South Africa became the latest country to provide equal pay across genders after they announced their male and female cricketers would receive the same match fees for international matches.