South Africa beat India by 141 runs yesterday in the opening ODI after piling up 358/4 here.
"...It doesn't mean that we are certainly going to win the series. There is a lot of hard work to be done. Durban will be a lot more suited to the Indians and they can bounce back. So it is important to keep our feet on the ground," he added," said de Villiers in a post-match press conference.
"India are certainly not a poor bowling line up. They do have the skill but they bowled a little bit short in the first five or ten overs. That gave us a big boost and confidence, and some momentum going forward," he explained.
"Not losing wickets in the first 10 overs at the Wanderers is always huge, no matter how many runs you score. It sets you up nicely for the last 40 overs and that is what happened today. It is quite handy keeping wickets in hand especially against a team like India," said de Villiers.
"It was certainly very important for us to start off the series like that. It is not easy for sub-continental teams to tour South Africa. It is important to never allow them to get any momentum going ahead. So this first game was always going to be important in that sense," de Villiers said.
South Africa piling on a huge total was mainly down to two partnerships -- the opening pair of Hashim Amla and Quinton de Kock, and later when JP Duminy and the skipper himself got together, battering India in the death overs.