The Bulls could not recover from conceding three tries in the opening nine minutes as the South African side went down 61-49 in their Champions Cup encounter against Bristol Bears at Loftus.
Stormers coach John Dobson has warned that a "desperate" Harlequins side could pose a serious threat ahead of Sunday's Investec Champions Cup clash at The Stoop.
Stormers prop Oli Kebble says pulling on the blue and white jersey has reaffirmed why returning home was so important at this stage of his career.
The Sharks began life under interim coach JP Pietersen with a gritty 28-23 victory over Saracens at a rain-soaked Kings Park on Saturday.
French club La Rochelle have strongly criticised the Champions Cup travel schedule ahead of their clash against the Stormers in Gqeberha this weekend.
The DHL Stormers dug deep in testing circumstances to claim a dramatic 26-17 Investec Champions Cup victory over Bayonne at the Parc des Sports Jean Dauger on Friday night.