Rohit Sharma's 36-ball 66 had propped up the Deccan Chargers to a modest 142 for eight after the hosts were reduced to 60 for five at one stage. But with skipper Sehwag on fire, Delhi Daredevils overwhelmed the target in 13 overs losing just one wicket for their second victory in a row.
Sehwag's 41-ball blitzkr-ieg of 94 not out included 10 hits to the fence, besides six towering sixes. Sehwag and Gautam Gambhir (12) began with a flourish and even though the left-hander perished in the fourth over, runs came thick and fast with Sehwag on song.
Sanjay Bangar bore the brunt of Sehwag's wrath in his second over, which cost the bowler 23 runs and included two sixes and as many boundaries.
Sehwag was lucky to get a reprieve on 13 when Pragyan Ojha dropped him off Chaminda Vaas in the deep and later, Adam Gilchrist made a mess of an easy stumping opportunity off Ojha. Sehwag replied by scoring 30 runs off an Andrew Symonds over that read 4, 6, 4, 6, 4, 6.
All along, Shikhar Dhawan (25 not out) was happy playing second fiddle.
Earlier, Rohit's belligerent 66 helped Deccan Chargers overcome a top-order collapse and post a modest 142 for eight. Rohit stood tall amid the ruins to slam his maiden IPL fifty and his explosive 66 included six fours and four sixes before he holed out to Glenn McGrath off Rajat Bhatia.
Deccan Chargers skipper VVS Laxman's decision to bat first boomeranged, with the hosts finding themselves in a hole as the score read 45 for four inside 10 overs.
After the miserly McGrath conceded just one run in his first over, identical two-wicket bursts from Mohammad Asif and Ferveez Maharoof tightened the noose around the hosts.
Adam Gilchrist (8) flicked Asif effortlessly for a magnificent six before dragging a delivery onto his stumps and the crisis compounded for the hosts, who soon had skipper Laxman (2) back in the hut, courtesy Asif. To make it worse, Maharoof claimed two scalps -- Y Venugopala Rao (14) and dangerman Symonds (12) -- in as many overs to pin them down.
With the team in dire straits, much was expected of Shahid Afridi (2) but the Pakistani swashbuckler scratched around for seven balls before Bhatia caught him plumb in front as the hosts lost their top half for just 60.
Rohit did not waste anymore time and went after Maharoof, milking 26 runs off the pacer's last over, which went 6, 6, 4, 4, 4, 2.
SCORE BOARD
DECCAN CHARGERS: Adam Gilchrist b Asif 8, Y Venugopala Rao c Dhawan b Maharoof 14, VVS Laxman b Asif 2, Andrew Symonds c Kaarthick b Maharoof 12, Rohit Sharma c McGrath b Bhatia 66, Shahid Afridi lbw Bhatia 2, Sanjay Bangar (run out) 8, Arjun Yadav c Gambhir b Yomahesh 12, Chaminda Vaas (not out) 12, Rudra Pratap Singh (not out) 1. Extras (LB-3, W-1, NB-1) 5. Total (for 8 wkts, 20 overs) 142.
Fall of wickets: 1-9, 2-23, 3-36, 4-45, 5-60, 6-82, 7-123, 8-129.
Bowling: Glenn McGrath 4-1-22-0, Mohammad Asif 4-0-19-0, Farveez Maharoof 4-0-36-2, V Yomahesh 4-0-35-1, Rajat Bhatia 4-0-27-2.
DELHI DAREDEVILS: Gautam Gambhir c Gilchrist b RP Singh 12, Virender Sehwag (not out) 94, Shikhar Dhawan (not out) 25. Extras (W-7, Penalty-5) 12. Total (for 1 wkt, 13 overs) 143.
Fall of wicket: 1-31.
Bowling: Chaminda Vaas 3-0-22-0, Rudra Pratap Singh 3-0-27-1, Sanjay Bangar 2-0-30-0, Shahid Afridi 2-0-17-0, Andrew Symonds 2-0-35-0, Pragyan Ojha 1-0-7-0.