Dhawan started well by playing a couple good straight-batted strokes. But his stay in the middle was short-lived.
Virat Kohli won the toss and asked the hosts bat first. There were changes galore in both camps with Williamson's inclusion and Chris Gayle's absence the most notable ones.
Kane Richardson struck in the fourth over to send Dhawan packing.
It was down to David Warner to steer Sunrisers Hyderabad once again
Rain played hide-and-seek in Hyderabad, threatening to play spoilsport ahead of the SRH vs RCB fixture.
Warner went after the RCB bowlers, for the second time this season, to score his fifth fifty of IPL 2016
A 124-run stand for the second wicket between Warner and Williamson powered Sunrisers towards a good total
Kane Williamson, playing in his first game of the season, scored a superb half-century.
Kohli went past 1,000 T20 runs in 2016 but endured a rare failure as he was dimissed for 14 in chase.
KL Rahul led RCB's chase with a quick-fire fifty
AB de Villiers was dropped twice on his way to a 32-ball 47. His wicket in the 15th over, however, turned the game in SRH's direction
Moises Henriques threw his bat around for a 14-ball 31 as SRH posted 194 for 5.