Skipper Michael Klinger and Daniel Harris produced a 124-run opening partnership to help South Australia inflict a humiliating eight-wicket defeat on Royal Challengers Bangalore and qualify for the Champions League Twenty20 semi-final in Durban on Friday.

South Australia first came out with a disciplined bowling display to restrict the Bangalore side to 154 in 19.5 overs on a slightly slow Kingsmead pitch and then achieved the target with nine balls to spare in the Group B encounter.

Klinger scored an unbeaten 69 off 57 balls with the help of nine fours and a six, while Harris came out with a brilliant 57 off 38 balls.

South Australia scored 155 for two in 18.3 overs, with Callum Ferguson (21 off 14) giving company to Klinger.

Earlier, Dillon du Preez and Ross Taylor scored an identical 46 to help Bangalore overcome a mid-innings slump and post 154 after Kumble opted to bat.

Taylor, who cracked eight fours and a huge six during his 28-ball stay, steadied the RCB innings in middle overs while Preez capitalised on his home condition when the team was struggling at 76 for five in 10.5 overs.

Du Preez struck one four and four sixes during his 25-ball innings and with Cameron White (25) produced a crucial 58-run partnership to pull the team out of the pits.

RCB folded up for 154 in 19.5 overs, with Daniel Christian scalping four late wickets for 23 runs.

Chasing 155 to win, openers Klinger and Harris started on an attacking note.

Klinger cracked a four in the second ball of the innings off medium pacer Praveen Kumar, while Harris cracked three fours in the sixth over off Dillon du Preez to add to the frustration of RCB skipper Anil Kumble.

All of RCB's bowlers proved quite ineffective and expensive on the Kingsmead pitch.

South Australia reached 50-run mark in the sixth over and then riding on the rampaging form of the two openers they crossed 100-run mark in the 12th over.

To the end of the match, the Australian side lost two quick wickets in the form of Harris, who adorned his innings with seven fours and two sixes, and Graham Manou (0).