Sydney - Stormers captain Jean de Villiers said his side still had a chance in the Super 14 competition, despite being beaten 12-6 by the Waratahs on Saturday.
The Waratahs’ winger Lachie Turner scored two tries, including a clinching effort in the final three minutes, to give his side the win.
It was the Waratahs' 11th straight win at Sydney Football Stadium.
A solo try by Turner helped the Waratahs take an early lead. Turner stepped past two defenders before regathering his own chip kick to score the only try of the half after just five minutes.
Daniel Halangahu added the conversion for a 7-0 lead, but the Stormers’ Peter Grant narrowed the deficit to four points with a 25th-minute penalty goal.
Kurtley Beale came into the match after 60 minutes, replacing fullback Sam Norton-Knight. Beale set up Turner's match-sealing second try with a midfield chip kick for his winger.
Grant added a second penalty in the second half before Turner's late try. The Waratahs, who missed five shots at goal, consolidated their place in the top four, moving into a first-place tie with New Zealand's Waikato Chiefs, each with 27 points, before two late South African matches.