Jacques Kallis guided South Africa to a seven-wicket win over World Twenty20 champions England at Chester-le-Street on Saturday.
The Proteas were in trouble at 3-29, chasing a seemingly modest 119 for victory.
But opener Kallis, returning to international duty after being rested from the drawn one-day series between the two countries, made 48 not out of 44 balls with seven fours.
Together with left-hander JP Duminy (47 not out) he shared an unbroken stand of 90 in 91 deliveries as the Proteas, who won with an over to spare, went 1-0 up in a three-match series ahead of this month's World Twenty20 in Sri Lanka.
Ultimately England's 7-118, their third lowest total in this format, did not give the bowlers enough to defend.