The Bulls, forced into late changes due to illness in the squad, left it late to claim a 17-15 victory over Benetton in the United Rugby Championship (URC) in Italy.
Sharks head coach John Plumtree slammed his players for being "nowhere near ruthless enough" after an embarrassing 10-38 defeat to a previously winless Benetton side in the United Rugby Championship on Saturday.
The Sharks had very little to smile about as they fell to a disappointing 38-19 United Rugby Championship (URC) defeat to Benetton at Stadio Monigo.
The Bulls booked a home tie in the United Rugby Championship play-offs after beating Benetton 56-35 at Loftus Versfeld.
The Bulls have been bolstered by the return of Johan Goosen from suspension for their crucial United Rugby Championship match against Benneton on Saturday.
Benetton took advantage of Murray Koster's red card to snatch a 25-24 victory over the Sharks which keeps alive their hopes of a United Rugby Championship (URC) play-off place.