Crusaders captain Richie McCaw, who was man-of-the-match, said it was great to win twice in South Africa.

"We created opportunities with our defence and took the chances on offer," he told Sky Sport.

"To win two on the trot in South Africa is what we were after."

Two penalties by first five-eighth Daniel Carter and a try to halfback Andy Ellis from a blindside sneak had the Crusaders 11 -0 up at halftime.

After the break, the Stormers dam threatened to burst apart, but they laboured away grimly to prevent the Crusaders notching a bonus point.

A massive score seemed in the offing when Carter slotted his third penalty in the 49th minute.

Two minutes later Carter set up a try for right wing Sean Maitland with a superb crosskick.

With 21 minutes left, the Crusaders stretched their lead to 22-0 on the back of another Carter penalty but could not add to that score.

The win took the Crusaders -- who beat the champion Bulls 54-19 last weekend in Pretoria -- to the top of the table.

The unbeaten Blues could move past them overnight, if the secure a bonus point win over the Cheetahs in Bloemfontein.

Super 14 rugby result from Cape Town today:

Crusaders 22 (A Ellis, S Maitland tries; D Carter 4 pen), Stormers 0. HT 11-0.

Stormers: Conrad Jantjes, Tonderaj Chavhanga, Gcobani Bobo, Jean de Villiers (captain), Sireli Naqelevuki, Peter Grant, Ricky Januarie, Luke Watson, Francois Louw, Pieter Myburgh, Andries Bekker, Adriaan Fondse, Brian Mujati, Tiaan Liebenberg, JD Moller. Reserves: Schalk Brits, Brok Harris, Ross Skeate, Robbie Diack, Bolla Conradie, Gio Aplon, Dylan Des Fountain.

Crusaders: Leon MacDonald, Kade Poki, Casey Laulala, Stephen Brett, Caleb Ralph, Daniel Carter, Andrew Ellis, Mose Tuiali'i, Richard McCaw (captain), Kieran Read, Ali Williams, Brad Thorn, Campbell Johnstone, Corey Flynn, Wyatt Crockett. Reserves: Ti'i Paulo, Greg Somerville, Reuben Thorne, Nasi Manu, Kahn Fotuali'i, Tim Bateman, Sean Maitland.