England lose four wickets for five runs as South Africa claim thrilling win
Morgan (52) smashes 16 in penultimate over before being caught in the deep
Roy hits 22-ball half-century for England - the joint-second fastest ever
South Africa stutter to 177-8 after losing four wickets in last two overs
Jordan takes two wickets in two balls in final over
Bavuma stars at top of the order with 43
England won toss; First of three T20s
South Africa captain Quinton de Kock: "It looks a good surface. We don't mind batting first, runs on the board can be key.
"Dale Steyn, the old man, is back. He's bowling really well lately, so it's great to have him in the side.
"The build-up to the World Cup, it's a great time to start. We want the boys to put up their hands and make selection difficult for us."
England captain Eoin Morgan: "The wicket looks good, there's a bit of a howling wind and there's not a lot of data on games being played here. It irons out what we'll have to do later one.
"Our senior players are back in, we're looking forward to tonight and what comes after this.
"Buttler, Wood, Stokes come back in. These are experienced guys who have played all over the world."
Eoin Morgan loves a chase.
Image source, Getty Images
Tim Peach
BBC Radio 5 Live in East London
It's a glorious evening in East London...
England are number three in the world T20 rankings and have won eight of their last 10 T20 matches, with two defeats.
South Africa are fifth in the world and won seven of their last 10 T20 matches, with two defeats and one abandonment.
Should be a good series.
Hello and welcome to live coverage of the first Twenty20 international between England and South Africa in East London.
It's the start of a big year for both T20 teams as they build towards this year's World Cup in Australia.
Can Eoin Morgan's side do the double?
We know the definite names on the plane but plenty of positions in the T20 squad up for grabs this year.