Australia and South Africa have entered the semifinals of the ICC Under-19 Cricket World Cup championship. At Sharjah on Sunday, Australia, chasing 209 runs for a victory, achieved the target beating the West Indies by five wickets with 20 balls to spare.In the other match at Dubai, South Africa defeated Afghanistan by nine wickets. Afghanistan playing first made 197 in the stipulated 50 overs. South Africa reached the target in 39.2 overs, losing only one wicket in the process.The other teams to reach in the semifinal are England and Pakistan.England will take on Pakistan and Australia meet South Africa in the semifinals.