SA looking to expose England’s batting unit

South Africa captain AB de Villiers says they will target England's batting unit ahead of the fourth and final Test starting in Centurion on Friday.

Although the four-match series has already been wrapped up by the visitors after their victories in the first and third Tests, De Villiers feels his bowlers have not exposed some weaknesses in the Three Lions' batting order.

De Villiers told reprters on Thursday: "There's no hiding from the fact they seem to know what they are doing – they understand their roles really well.

"There's also no doubt in my mind there are weaknesses there, and we have exposed some of them over the last few weeks – but not enough.

"That will be the plan over the next five days, not to over-perform but to try and sustain that kind of pressure for longer.

"The batting is not 100 per cent best-in-the-world material – there are areas we can expose if we start well with the ball, build up dots."

The teams will play five ODIs and two T20s after the Test series.