Big picture: South Africa aiming for series sweep
The series has been won, but it's not quite mission accomplished for South Africa, who are a win away from getting up into the top eight of the World Cup Super League. Two clinical performances against the reigning world champions (albeit England's crown has slipped a fair bit recently) means they are sitting a little more comfortably, with a pair of home fixtures against Netherlands to come, but these are fine margins and something as small as an over-rate penalty could be the difference between securing a direct spot for India later this year or going to the qualifier in Zimbabwe.
At least, you might peg it as rare, before a quick check confirms England lost their last ODI series, a benighted bit of scheduling post-T20 World Cup in Australia, 3-0 as well. Their record since Buttler was installed as Eoin Morgan's permanent successor last year currently reads: P11 W2 L8. Even if outwardly the mantra remains positive, and there is time aplenty to formulate plans for the World Cup defence in October-November, it's hard to think of an instance when a win was more needed since the Morgan revolution began in 2015.
Buttler seems as unflappable as his predecessor and barely needs to bother marshalling a defence. The Australia series gets a free pass, since it came days after the captain was being snapped on a Melbourne beachfront holding the T20 World Cup. Here he is without the likes of Joe Root, Jonny Bairstow, Liam Livingstone and Mark Wood - in part because of injury, in part because of a schedule that means England currently have full men's squads in both South Africa and New Zealand. Not to mention Ben Stokes, the king over the water whose unretirement bandwagon is already gathering pace.
He can also point to the fact that an England side with a little more consistent ODI cricket under their belts would have expected to win both games in Bloemfontein. Kimberley is mining country, the "Big Hole" one of the local tourist attractions - but England have time to dig themselves out of difficulty yet.
Form guide
South Africa WWLLW (last five completed ODIs, most recent first)
England: LLLLL
In the spotlight: Aiden Markram and Moeen Ali
Since making his ODI debut in October 2017, Aiden Markram has played 45 ODIs while averaging 28.75 - the only other top-four batter to score 1000 runs in that time at a lower average is the now-retired William Porterfield. Markram's nickname is "Sauce", apparently because he goes with everything, and there were glimpses of his undoubted talent in a 43-ball 49 in the second ODI, during which he also burgled the wicket of Harry Brook. But time is running out to prove he's got the special sauce across all three formats for South Africa.
Team news: De Kock likely to miss out
De Kock hurt his hand while keeping during the second ODI and remains "under medical observation"; he seems set to sit this one out, with Janneman Malan and Reeza Hendricks - the only two South Africa players to net on Tuesday - waiting in the wings as back-up openers. None of the frontline quicks, Kagiso Rabada, Anrich Nortje and Lungi Ngidi, bowled at training and South Africa could deploy both spinners, Keshav Maharaj and Tabraiz Shamsi, depending on conditions.
South Africa: (possible) 1 Janneman Malan/Reeza Hendricks, 2 Temba Bavuma (capt), Rassie van der Dussen, 4 Aiden Markram, 5 Heinrich Klaasen (wk), 6 David Miller, 7 Marco Jansen, 8 Wayne Parnell, 9 Sisanda Magala, 10 Keshav Maharaj, 11 Tabraiz Shamsi
England have Phil Salt available after illness if they want to make changes to the batting and will likely shuffle the bowling attack. Jofra Archer could make his second appearance of the series, having taken 1 for 81 on his long-awaited England comeback last week - and despite being a potential starter for MI Cape Town 24 hours later. Chris Woakes and Reece Topley both endured a pasting in the second ODI, while Olly Stone was England's best bowler but may be in line for some workload management.
England: (possible) 1 Jason Roy, 2 Phil Salt, 3 Dawid Malan, 4 Harry Brook, 5 Jos Buttler (capt & wk), 6 Moeen Ali, 7 Sam Curran, 8 Chris Woakes, 9 David Willey, 10 Adil Rashid, 11 Jofra Archer
Pitch and conditions: Kimberley set to be hot and flat
Kimberley has not hosted an ODI since 2018, when Zimbabwe managed just 117 against an attack spearheaded by Rabada and Ngidi. But a flat surface is expected for this contest and soaring temperatures plus a short boundary suggests another round of 300-plus run-scoring could be in the offing.
Stats and trivia
- The last time England lost five ODIs in a row came at home during series against Sri Lanka and India in 2014. They have not lost six on the bounce since 2009.
- South Africa are aiming for their first ODI series whitewash against England.
- England have only played one previous ODI in Kimberley - an eight-wicket win over Zimbabwe in 2000.
- Wayne Parnell needs two wickets to reach 100 in ODIs. He will be the 13th South Africa to reach the milestone.
Quotes
"We're here to win, we want to win the series 3-0. It's really important to be putting the right people on the park but our squad is incredibly strong, we're always producing great cricketers in South Africa. Whoever does play I have no doubt that we're going to have a full-strength team. To be nice and clinical would be the cherry on top."
David Miller says the hosts are intent on securing a whitewash
"We haven't played our greatest cricket. We've not had the all-round performance that we want but there's some positives to take forward. Hopefully we can win the final game and finish the series on a positive note."
Olly Stone attempts to rally the troops
Alan Gardner is a deputy editor at ESPNcricinfo. @alanroderick