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Codi Yusuf gets to bowl the second over of the day.

The ODI debutant's first ball is a leg side wide and Ben Duckett sends the follow-up through square for two.

No first-ball wicket on this occasion, as Jamie Smith sends Nandre Burger's first ball out to the point fielder.

Both of England's openers end up in somewhat risky situations later in the over - Jamie Smith goes after a wide-ish delivery and sends a flying edge out to deep third.

The ball drops short of Tristan Stubbs who runs in from the ropes - he looks a bit disappointed but I'm not sure there was a catching chance there.

Ben Duckett then drops the following delivery towards his stumps - he turns and covers it with his bat, but the ball stops before it reaches the poles.

Sir Alastair Cook
Ex-England captain on Test Match Special

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For Jamie Smith, it's about learning the role and how to pace an innings.

He's been trying to go hard at the top, but it's about trying to find that balance which is hard.

Here we go then.

England's openers Ben Duckett and Jamie Smith join South Africa's team on the pitch.

Smith will face the first ball from Nandre Burger, he was caught behind off the seamer's first ball of the innings at Lord's on Thursday.

Kieran Parmley
CricViz analyst

England have a strong record in Southampton in ODIs, winning eight of their last nine matches here. However they've only played one ODI (vs New Zealand, 2023) at Southampton since the Ireland series during 2020.

Bit of an odd situation - it's now sunny in Southampton and South Africa are standing by the boundary rope, but we've still got 10 minutes to wait after the start was delayed by a quarter of an hour.

The forecast is looking fairly good, we shouldn't have any trouble getting a game on.

England all-rounder Jacob Bethell on Sky Sports: "That result meant we were 2-0 down in the series which was obviously really disappointing but it was a much better all-round performance. Maybe they got about 30 too many with the bat but it was very impressive to get as close as we did, still disappointed but looking to go well today."

On batting at number four: "I really enjoyed it. It wasn't pre-planned up until a few minutes before. They had two left-arm spinners so it was my job as a left-hander to go out and show a bit of intent against them but it ended up being the off-spinner I felt was easiest to play. But it was a bit of a show to try and push the game on a bit."

On his approach to spin: "The first couple of overs Maharaj bowled really well, he was getting a bit of drift away from me but being able to hit one over mid-wicket for six meant I knew he was going to have to then go fuller and wider, so I could access mid-off. It's just playing the game and trusting your footwork and timing to take them down."

First full international summer: "I've really enjoyed it, obviously that West Indies series was a clean sweep and we had a great series. I know I didn't play much in the Test series after that but just to be involved and to see a high-octane series like that was unbelievable. I got a chance in the last Test and unfortunately couldn't put a performance together but I loved it. Playing for England is a dream come true and I hope I can do it for a long time."

On the scrutiny: "Yeah, a little bit of noise but I don't listen to it much. If I'm honest, when I wasn't playing in those Tests, I should probably have played a bit more. But I'll take that on and learn from it. I've got a lot of cricket ahead now so maybe that gap was quite nice for me."

On this final ODI: "The talk after the last game was quite confident. We were happy with a lot of things, we just couldn't quite get over the line. Today is not really that different. Obviously the dimensions of this ground can play a bit differently, it means we have to access different areas of the ground as batters and protect different areas as bowlers so those are things to think about. But otherwise it's going out there with the same template and putting a score on the board. I don't think I'll be four today - Brooky likes it there."

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England: Jamie Smith, Ben Duckett, Joe Root, Harry Brook (c), Jos Buttler (wk), Jacob Bethell, Will Jacks, Jamie Overton, Brydon Carse, Jofra Archer, Adil Rashid

South Africa: Aiden Markram, Ryan Rickelton (wk), Temba Bavuma (c), Matthew Breetzke, Tristan Stubbs, Dewald Brevis, Wiaan Mulder, Corbin Bosch, Keshav Maharaj, Codi Yusuf, Nandre Burger

One change for England, with Jamie Overton getting his first game of the series in place of Saqib Mahmood.

The remaining 10 players have played all three games of the series.

Two players come in for South Africa - Wiaan Mulder returns after missing Lord's on Thursday, while Codi Yusuf gets an ODI debut. The 27-year-old seamer made his first appearances in Tests against Zimbabwe recently after impressing at Durham early in the season. Senuran Muthusamy and Lungi Ngidi miss out.

England captain Harry Brook: "We'd have had a bowl as well.

"More of the same, be aggressive with the bat and the ball, try and take wickets and put their bowlers under pressure.

"It looks like a good wicket, it's the reason why we'd have had a bowl, we'd have fancied our chances chasing."

On Jamie Overton coming in for Saqib Mahmood: "Just rotation really."

Matthew Henry
BBC Sport journalist in Southampton

Good morning. The rain shower we had around 10 minutes ago was heavy. It came just after South Africa won the toss and sent spectators and pundits racing for cover.

Would South Africa have chosen to bowl had they known? It may well liven up the pitch - it remains under covers - but the ball will likely take on a fair bit of water early on.

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South Africa captain Temba Bavuma has won the toss in Southampton and his side are going to have a bowl.

All three tosses in this series have seen the winner choose to bat second.

There was a flurry of heavy rain almost immediately after the toss occurred, but it seems to have passed already - it's delayed the start by 15 minutes, so we'll get going at 11:15 BST.

Yes, welcome to the third and final ODI of England's series against South Africa.

The tourists have won the first two matches so this closing game is England's chance to regain some pride, while Temba Bavuma's side will be looking to sweep the series.

Anyone for some mortuum ficus elastica?

That’s a dead rubber, to you and me.