The Western Force held on to beat the Waratahs 20-21 and secured their first Super Rugby victory of the 2012 season.
The Waratahs lost last weekend in Dunedin against the Highlanders which means that the Sydney-siders have now lost to the bottom ranked team and the top ranked Super Rugby team in two weeks and have a record of won one and lost three overall.
Western Force fullback David Harvey scored a try on his Super Rugby debut and kicked three penalties as well as converted his own try.
Both teams scored two tries each but the difference came down to kicks. Harvey kicked three penalties to Daniel Halangahu's two penalties.
Western Force winger Samu Wara crossed for the match-winning try in the 64th minute.
Adam Ashley-Cooper and Tom Kingston scored tries for the Waratahs.
The Waratahs took a second-half lead when Halangahu hit successive penalty goals in the 57th and 62nd minutes.
But Wara scored the winning try when he took a pass from hooker Nathan Charles and stepped inside Halangahu to dive over in the right corner.
Winger Ashley-Cooper tagged on to a rolling maul to score a try in the fifth minute, and Halangahu converted for a 7-0 New South Wales lead.
Harvey notched his first points in Super rugby with an easy 10th-minute penalty goal to reduce the deficit to four.
He then benefited from an inside offload from scrumhalf James Stannard to cross and convert to give the Force a 10-7 lead.
The Waratahs regained the advantage just before halftime with a fortuitous try to winger Kingston.
Waratahs halfback Sarel Pretorius appeared to knock the ball out of the hands of his Force opposite Brett Sheehan, but New Zealand referee Jonathon White ruled play on.
Pretorius toed the ball ahead and Kingston calmly regathered and dived over in the corner.
Halangahu's conversion had the Waratahs four points in front before Harvey's second penalty in the 40th minute made it a one-point advantage for the Waratahs at halftime.
Ashley-Cooper had a try denied early in the second half when center Rob Horne was penalized for obstruction.
Final Score Waratahs 20 (14) Force 21 (13)
Tries -A Ashley-Cooper, T Kingston
Pen - D Halangahu 2
Con - D Halangahu 2
Cards - D Mumm (15th min yellow)
Tries - D Harvey, S Wara
Pen - D Harvey 3
Con - D Harvey
Referee: :Jonathon White
Assistant Ref 1 Steve Walsh
Assistant Ref 2: Angus Gardner
TMO : George Ayoub
15. Bernard Foley , 14. Tom Kingston , 13. Rob Horne , 12. Berrick Barnes , 11. Adam Ashley-Cooper , 10. Daniel Halangahu , captain , 9. Sarel Pretorius , 8. Tevita Metuisela , 7. Jono Jenkins , 6. Dave Dennis , 5. Kane Douglas , 4. Dean Mumm , 3. Sekope Kepu , 2. Tatafu Polota-Nau , 1. Benn Robinson , vice captain
Replacements , 16. John Ulugia , 17. Paddy Ryan , 18. Sitaleki Timani , 19. Richard Stanford , 20. Chris Alcock , 21. Brendan McKibbin , 22. Tom Carter
1. Pek Cowan, 2. Nathan Charles, 3. Salesi Ma'afu, 4. Sam Wykes, 5. Nathan Sharpe, 6. Angus Cottrell, 7. David Pocock (c), 8. Matt Hodgson, 9. Brett Sheehan, 10. James Stannard, 11. Alfie Mafi, 12. Rory Sidey, 13. Will Tupou, 14. Samu Wara, 15. David Harvey.
16. Ben Whittaker, 17. Kieran Longbottom, 18. Phoenix Battye, 19. Richard Brown, 20. Justin Turner, 21. Ben Seymour, 22. Winston Stanley.