Not much went wrong for Root in his first game in the job.
Root's predecessor Cook made a fine 173 in his very first innings as England Test captain in Chittagong, as he, with help from Paul Collingwood (145) and Kevin Pietersen (99) ensured his side amassed 599 for six before he declared. Maybe he sensed some unevenness on a dry pitch, maybe it was just the sense of occasion that a packed house at Lord's generates.
Off-spinner Moeen Ali‚ who scored 87 and took 4/59 in the first innings‚ claimed 6/53 to complete a career-best match haul of 10/112.
Nineteen wickets fell on Sunday, with the surface offering variable bounce as well as plenty of turn.
Following Root's magnificent knock, Moeen and Broad picked up two wickets as South Africa ended the day on 214/5, still trailing the hosts by 244 runs.
He was inconvenienced, if not ruffled, by lbw reviews off the bowling of Morne Morkel, whose delivery was shown to have pitched outside leg stump, and Maharaj, who struck him outside the line of off with a sharply spinning ball.
The Proteas capitulated on the final afternoon of the fourth day of the first Test when they bowled out for 119, handing England - being captained for the first time by Joe Root - a 211-run victory and 1-0 lead in the four-match series.
Afterwards Root said: "It is a nice start definitely".
Alastair Cook was caught at cover, Gary Ballance nicked a beauty from Morkel, Root dragged on and Ben Stokes was plumb leg before.
Hampshire left-arm spinner Liam Dawson, on his home debut, made the initial breakthrough with just his second ball Saturday when Rabada (27) edged to wicket-keeper Jonny Bairstow.
Broad was left unbeaten on 57 off 47 balls, including eight fours. Riding high on the momentum of quick wickets, South Africa could have had Bairstow as well for just 7, with England's lead just 254 when Vernon Philander dropped an absolute dolly off the bowling of Keshav Maharaj. When Bairstow was stumped for 51 off Maharaj, South Africa's prospects of winning had all but faded.
Elgar and debutant Heino Kuhn were separated after seven overs of South Africa's second innings when Anderson had Kuhn caught down the leg side for nine.
JP Duminy pulled a long hop from Mark Wood straight to mid-wicket and then Dawson snared his first victim - producing a beauty to trap Hashim Amla lbw. But Temba Bavuma, calm and watchful, joined forces with Theunis de Bruyn, relishing his second Test appearance and this pair added 99 together, whereupon Jimmy Anderson found the edge of De Bruyn's bat.
Root added: "The thing I was anxious about most was that I tossed the coin right - I brought a quid out with me but [the officials] had three already so I had to use one of those!" Also for Cook, it is the joint-most he has got out to any bowler, along with Mitchell Johnson.
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