Dawid Malan hit an aggressive 78 on debut to help England beat South Africa by 19 runs and complete a Twenty20 series victory in Cardiff.
Malan targeted South Africa’s seamers, striking 12 fours and two sixes in a 44-ball knock as England posted 181-8.
Chris Jordan took 3-31 and Tom Curran – in only his second game – 2-22 to restrict the Proteas in their chase.
AB de Villiers made 39 and Mangaliso Mosehle 36 off 22 balls but South Africa could manage only 162-7.
England, returning to the venue of their Champions Trophy semi-final defeat by Pakistan, put in a professional performance to wrap up the series.
Middlesex left-hander Malan, 29, made the highest score by an England player on T20 debut, beating Paul Collingwood’s 46 in England’s maiden match in this format in 2005.
England, whose next white-ball series is not until September against West Indies, begin a four-Test series against South Africa on 6 July.