The former England captain, who is back in England for national duty for a home series against the West Indies, was one of the top performers for Daredevils this season. Pietersen was eighth in the list of top-scorers with 305 runs which includes an unbeaten century (103) against Deccan Chargers.
Warner said he will be opening the innings with skipper Virender Sehwag which means Mahela Jayawardene will drop down the order.
"I always see myself playing at the top of the order with Viru and would continue doing so. The important thing is that all of us, Viru, myself and Mahela score runs for Daredevils. I will have to keep executing my skills. Obviously KP (Pietersen) has done very well and it would be my responsibility to cover his spot well," said Warner, who joined the Daredevils on Staurday for the first pratice session after returning from the West Indies.
Warner said Test cricket hasn't changed his aggressive batting style, "Test cricket hasn't changed me as a batsman. I still believe in "if you see it, then hit it." If it's there in my zone, I will still go for my shot. That has been my role so far," said Warner.
Warner praised Pietersen and Rajasthan Royals opener Ajinkya Rahane for their impressive performance in this season so far.
"KP's century (against Deccan Chargers) was one of the best innings I have seen. Rahane has also been fantastic. Not to forget Cameron White who has already scored three 70's in the last four games. White hasn't been in best of form last season but it's good to see him do well," he said.
Warner also said he would have no problem in adapting to conditions and adjusting to Twenty20 cricket after a Test series.
"It's the duty of a professional athlete to adapt to any conditions as quickly as possible. I have been playing for the past 12 months and have been in good form. My job would be to attack the opposition from ball one and hopefully I will do that on Monday," he said.