Opener Simmons (68) and Rayudu (68) frustrated Hyderabad bowlers for 14.3 overs during which they shared 130 runs for the second wicket as Mumbai chased down the target of 158 with eight balls to spare at the Rajiv Gandhi International Cricket Stadium at Uppal.
With today's win, their third from nine matches, Mumbai, jumped to sixth spot with six points while Hyderabad remained on fifth position with eight points from nine matches
They batted slow for a while before Simmons took 16 runs off Irfan Pathan in the fifth over with two sixes and a four. Pathan was the unfortunate bowler as he was also picked by Rayudu for special treatment later on and the pacer conceded 29 runs from his two overs.
Leg-spinner Amit Mishra was also expensive as he conceded 33 runs from his three wicketless overs to add to the woes of Hyderabad who were playing their first match at home in IPL-7.
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From 32 for one at the end of the fifth over, Mumbai reached 32 for one at the halfway stage and then raced away to 125 for one at the end of the 15th over and the asking rate had been brought down below seven an over by then.
The duo, however, were out in quick succession -- in the 16th and 17th overs off Bhuvneshwar (2/21) and Moises Henriques (1/23) respectively -- as Mumbai faced some jittery moments towards the end before skipper Rohit Sharma (14 not out) and Kieron Pollard (6 not out) took their side home.