The young 19-year-old off-spinner played a vital role in Delhi's comfortable six-wicket win over Rajasthan with figures of 18/4 in four overs.
Negi, who also claimed other important wickets of Ajinkya Rahane, Brad Hodge and Ashok Menaria, said,"I was just trying to stop the flow of runs. It was a good wicket and they (Rajasthan batsmen) played a few bad shots too. The wicket of (Shane) Watson was the prized one because he is such a good player."
Negi was asked to bowl after the sixth over during which the home team were cruising at 56 without any wicket, Negi ripped through the Royals batting line-up to restrict them to a decent 141/6.
Negi also said skipper Sehwag had given him specific instructions on how to bowl, "He (Sehwag) told me that Rajasthan batsmen play a lot of inside out shots over extra cover. So he asked me to keep balls a bit short so as to not allow them to go for such shots. This worked to perfection."
With this victory, Delhi are three points clear at the top of the table with 16 points. Rajasthan Royals are currently sixth with eight points.
Delhi Daredevils take on second placed Kolkata Knight Riders on May 7, while Rajasthan Royals face Kings XI Punjab on Saturday, May 5.