England gave a shock debut to Nottinghamshire pace bowler Darren Pattinson in one of two changes to the team that drew the first of this four-Test series at Lord's.
Former roof tiler Pattinson, who has appeared in just 11 first-class matches, wasn't in the original squad for this match and nor was he even the first reserve.
But, having been called up as cover for James Anderson on Thursday, the 29-year-old swing bowler was included in the team.
Anderson was passed fit but left-arm quick Ryan Sidebottom, a county colleague of Pattinson's, was ruled out with the back strain he sustained at Lord's.
All-rounder Andrew Flintoff was recalled for his first Test in 18 months at the expense of the out-of-form Paul Collingwood in the other change to the England team.
Pattinson had still to make his first-class debut when Flintoff played his last Test.
Born in Grimsby, northern England, but raised in Australia, Pattinson only made his first-class debut in January 2007 after several seasons playing for Melbourne club side Dandenong.
In his brief senior career he has had a habit of starring on his debut.
His maiden first-class match for Victoria saw him take four for 87 against South Australia.
He joined Nottinghamshire at the start of this season after being recommended to the Midlands county by Australian batsman David Hussey in 2006 and impressing in several net sessions.
Pattinson, who signed a two-year deal with Trent Bridge-based Nottinghamshire in April, took eight wickets on his County Championship debut, against Kent, and was recently included in England's provisional 30-man squad for the ICC Champions Trophy.
England did have the option of calling-up the likes of 2005 Ashes heroes Simon Jones, Stephen Harmison and Mathes Hoggard but instead opted for Pattinson, who has taken 29 first-class wickets in six matches this season at 20.86 apiece.
Hampshire fast bowler Chris Tremlett, who had been called up as cover for Sidebottom, was left out.
South Africa were unchanged with opening batsman Neil McKenzie, whose marathon century lasting more than nine hours did much to ensure the opening match of this four-Test series ended in a draw, retained after suffering a groin strain.
Smith also fielded first at Lord's where the Proteas were made to follow-on but the overcast skies in evidence at Headingley Friday often herald favourable conditions for swing bowlers.
Michael Vaughan, on his Yorkshire home ground, was captaining England in a Test match for the 50th time.
Only Michael Atherton, who led the side 54 times between 1993 and 2001, has captained England's Test team on more occasions.
Vaughan's record as captain features 26 wins, 14 draws and nine defeats.
England: Andrew Strauss, Alastair Cook, Michael Vaughan (capt), Kevin Pietersen, Ian Bell, Tim Ambrose (wkt), Andrew Flintoff, Stuart Broad, James Anderson, Monty Panesar, Darren Pattinson
South Africa: Graeme Smith (capt), Neil McKenzie, Hashim Amla, Jacques Kallis, Ashwell Prince, AB de Villiers, Mark Boucher (wkt), Morne Morkel, Paul Harris, Dale Steyn Makhaya Ntini
Umpires: Daryl Harper (AUS) and Billy Bowden (NZL)
TV umpire: Richard Kettleborough (ENG)
Match referee: Jeff Crowe (NZL)