The Springboks are hoping to wrap up victory in their Test series against Stuart Lancaster's men by following up last week's success in Durban with another win in Johannesburg this weekend.
South Africa went into the opening encounter rusty after spending less than a week in camp together with a number of new faces and a new coach in Heyneke Meyer.
De Villiers claims the Springboks were far from their best in the 22-17 win and expects a more fluid display in the next clash at Coca-Cola Park.
Speaking at his pre-match press conference, De Villiers said: "The main thing for us is to improve.
"Last week I think we were happy to just get away with a win because the butterflies were there - the guys were a little bit nervous, including myself and the coach.
"But now it is a week later and we have looked at the video and seen there is a lot to improve on.
"We weren't great on Saturday and we managed just to get the win.
"But we need to improve at the right time, we need to improve on our attack and even our set phases can improve a lot.
"It's all about improving and taking an upward step as a team.
"That is the main thing for us and hopefully, if we do that we get the right result."
De Villiers, handed the captaincy until the end of the series, scored one of his side's two tries last week.
The 31-year-old, who is poised to win his 74th cap, still bears the scars from the clash with a wound near his right eye.
South Africa are strong favourites ahead of the second Test with the altitude and their formidable record at the ground formerly known as Ellis Park also in their favour.
The Springboks have lost just three times at what is considered to be their spiritual home since winning the World Cup there in 1995.
De Villiers said: "The history of Ellis Park is fantastic. What we achieved there in 1995 and post that has been good for South African rugby, for the Springboks.
"Our record is good at Ellis Park.
"We are excited about the game but we need to go out and play good rugby. We are hoping to do that on Saturday."
Gilbert has released a new line of rugby cleats. The Gilbert Virtuo 8S is part of the exciting new product. Check it out.
The entire All Blacks apparel line has been updated for 2013/14. Check out the New Zealand All Blacks polo.
The Nike Tiempo is a solid rugby cleat and one of few styles still made from full-grain natural leather.
The Gilbert Blitz 8S rugby cleat is a great cleat at a great price of $69.99. Get a new pair of cleats today.
A cool looking all black rugby cleat with the high performance adidas is known for. Get in the Gear!
Wear the crest of the British and Irish Lions on your t-shirt. A great look for the summer.
The All Blacks Performance t-shirt is black with hints of blue from the training jersey. Very Cool.
The New Zealand All Blacks training jersey for 2013/14. Get in the Gear!
The USA Rugby Pro Alternate rugby jersey is perfect for any fan of the Eagles. Get yours to wear during the summer Test matches.
The NEW All Blacks 2013/14 jersey has arrived at World Rugby Shop. Dare to wear the colors of the All Blacks.