Christchurch: South Africa more or less assured themselves of a berth in the semi-finals when they scored a facile six-wicket victory over Sri Lanka in a league match of the Women's World Cup 2000 at the Lincoln Green on Friday.South Africa's victory made England's chances of qualifying for the semi-finals all the more difficult. England will have to defeat either defending champions Australia on strong contenders hosts New Zealand to entertain some hopes of reaching the last four stage.South African skipper Kim Price won the toss and sent Sri Lanka into bat. Sri Lanka were once again beset with problems in running between the wickets and lost four wickets to run outs. The Sri Lankans never managed any useful partnership going and were restricted to 134 for nine in 54 overs.Champa Sugathadasa and Chandrika Lakmalee made 21 runs each. Champa consumed 64 balls and hit two boundaries, while Chandrika took 27 balls and her effort included three hits to the fence. South Africa, in reply, rode on the unbeaten 53 runs of Daleen Terblanche to reach 135 for four off 45.3 overs.Daleen was the mainstay of the South African batting and her effort came off 87 balls with five fours. Linda Olivier made 26 runs from 66 balls with two fours. India meet New Zealand in a crucial league match on Saturday. This match could decide the second and third places in the league table.