SOUTH Africa crushed Australia by 134 runs to cruise to their second victory at the World Cup, as Quinton de Kock struck back-to-back tons and Aiden Markram made a half-century before the bowlers ripped through the five-times champions. Chasing 312, Australia lost half their wickets for 65 runs and struggled against Kagiso Rabada (3-33), Marco Jansen (2-54) and Keshav Maharaj (2-30) as they folded for 177 in 40.5 overs with Marnus Labuschagne (46) their only batsman to fire. The comprehensive victory was built on a platform provided by De Kock, who scored 109 while Markram made a handy 56 to…