With rookie Steve Smith, whose credentials as a Test number six have been questioned by seasoned observers and home fans alike, and the out-of-form Michael Clarke at the crease, England sensed another dismissal was close.
But while questions will inevitably demand answers about England's top order, South Africa produced yet another tight-knit bowling performance with Kallis, short of Test runs himself, emphasising his all-round credentials by capturing 3-31 and taking a brilliant low catch to dismiss Cook.