CAPE TOWN :South Africa's Twenty20 captain Aiden Markram wants his team's promising young batsman to use the opportunity of limited overs tours to Australia and England over the next eight weeks to develop their careers and display their international potential. South Africa have high hopes for powerful teenage slogger Lhuan-dre Pretorius and Dewald Brevis, the prolific 22-year-old run scorer who first competed in the Indian Premier League three years ago, as they continue preparations for next