Sydney: Spinners Imran Tahir and hat-trick man Jean-Paul Duminy shared seven wickets between them to help a clinical South Africa outplay an unusually hapless Sri Lanka by 9 wickets and enter the cricket World Cup semi-finals, here today.

Leg-spinner Tahir (4-26) looked like a man possessed while Duminy (3-29) bagged the second hat-trick of this edition -- after England's Steven Finn -- as South Africa sent the Lankans packing for 133 in 37.2 overs in the first quarter-final of this edition.