Ben Stokes has praised Matthew Potts for his maturity after he was dropped for England's second Test against South Africa at Old Trafford.

Potts struggled for rhythm during a heavy opening defeat at Lord's, the first Test loss of the Brendon McCullum era and since Stokes took the captaincy permanently from Joe Root.

That has seen the bowler pay the price, with Ollie Robinson called up in his place, but Stokes nevertheless believes Potts remains a key member of the wider England cohort.

"It's very tough for Matty to miss out, but what he's done in the five games that he's played is he's taken himself from a county cricketer with a lot of promise and really announced himself on the big stage," Stokes told reporters.

"We've got to give him a lot of credit, to handle the decision so professionally at such a young age is a real indication of where we're at at the moment as a team.

"The selection was based around what we thought was the best bowling attack to suit this particular ground and he completely understood that."

Robinson has not played for England since the end of the Ashes tour in January, with a combination of fitness issues keeping him out of the fold.

But an impressive showing for the England Lions earlier this month has seen him recalled, with Stokes hopeful the paceman will complicate matters for South Africa's batters.

"When you look at what Ollie possesses as a bowler, one of his real key assets is how much extra bounce he gets compared to other bowlers in our squad," Stokes said.

"We think here at Old Trafford, with it being a slightly quicker wicket than other grounds we play at, it obviously offers a lot more bounce. We obviously pick the team we think is going to enable us to win the Test."

Having brushed aside New Zealand as part of the 'Bazball' approach, defeat against South Africa brought England back down with a bumpy landing.

"What we have learned from ourselves is that you can't always go out there and perform how you want to perform," Stokes explained.

"The address after the game was, 'look, lads, you have obviously not performed anywhere near the capabilities we want to and we know we can, but it's not something that we are going to take backward steps from'.

"South Africa were better than us in that Test, that's fine, that's sport. Sport is set up for someone to be a winner and someone to be a loser. We are focussing on this game and the next and want to win the series 2-1."

Fortress Old Trafford needed for England

The hosts will be looking to avoid back-to-back defeats in men's Tests at home for the first time since August 2008, following their innings and 12-run defeat to the Proteas.

England will take heart from their strong Old Trafford record against the tourists, having lost only one of their nine men's Tests against them at Old Trafford, way back in July 1955.

Elgar eyes milestone

South Africa captain Dean Elgar needs just 89 runs to become the eighth player to hit the 5,000 mark in men's Test cricket for South Africa.

He might just get them too, with his Test batting strike rate in England (51.8) his second-best in any country (60.7 in Pakistan).