Quinton De Kock (R) and Hashim Amla (R) of South Africa celebrate the wicket of Jonny Bairstow of England off the bowling of Imran Tahir of South Africa.
LONDON - Proteas captain Faf du Plessis won the toss and elected to field against England in the opening match of the World Cup at the Oval on Thursday.
England, the world's top-ranked one-day international side and the tournament favourites, included fast bowler Liam Plunkett in a line-up captained by Eoin Morgan, with Tom Curran missing out on his Surrey home ground.
South Africa omitted allrounder Chris Morris, with Dwayne Pretorius selected.
"A 10.30 am start at The Oval - if there's anything in the wicket, it'll be in the first hour. We've got some fantastic fast bowlers and we're hoping it'll be a great occasion today," said Du Plessis.
Morgan said: "We would have looked to do the same, just preferring chasing. The wicket looks really good.
"The balance we've gone with is for South Africa so hopefully it is the right one. Mark Wood has trained fully and is available for selection, but unfortunately he's missed out.
"Jofra (Archer) has come in and impressed. He's very calm when he plays. He's a very exciting prospect given this is the very start of his international career.
"The favourites tag sits with us comfortably. It's been a collective drive for us. I much prefer going in as favourites."
England: Jason Roy, Jonny Bairstow, Joe Root, Eoin Morgan (capt), Jos Buttler (wkt), Ben Stokes, Moeen Ali, Chris Woakes, Adil Rashid, Liam Plunkett, Jofra Archer
South Africa: Hashim Amla, Quinton de Kock (wkt), Aiden Markram, Faf du Plessis (capt), Rassie van der Dussen, JP Duminy, Dwaine Pretorius, Andile Phehlukwayo, Kagiso Rabada, Lungi Ngidi, Imran Tahir
Umpires: Kumar Dharmansena (SRI), Bruce Oxenford (AUS)
TV umpire: Paul Reiffel (AUS)
Match referee: David Boon (AUS)