It was a odd, albeit entertaining, match by some accounts. Yadav felt that despite Mumbai Indians' batting tapering off, the target was one they could have defended.
Roy is one of 11 England players in this year's IPL.
His innings contained six fours and six sixes as Delhi secured their first win of the tournament. SRH is hoping to secure their third match victory today.
Where did MI lose it?
However, his bowlers weren't quite up to the mark in the initial overs, with Suryakumar Yadav (promoted to the top of the order in a surprise move) and Evin Lewis smacking them out of the park to collect 84 for no loss in the Powerplay. The pair added another eighteen runs before disaster struck. They lost all the three games that they have played thus far.More news: Pompeo Faces Tough Questioning In Secretary Of State Confirmation Hearing
Suryakumar made his 50 before being trapped lbw, with Kishan then picking up the baton and smashing seven boundaries - his stint ended by Dan Christian (2-35), who swiftly removed Kieron Pollard, next in, for a golden duck. This time, however, they couldn't recover.
Earlier, Mumbai scored 194 runs and attempted to give Delhi a challenge.
Not only was Roy's hitting as clean as a whistle, with even a mishit clearing the straight fence on one occasion, but his counter-attack also helped maintain the confidence in the Delhi camp throughout the chase despite the occasional wicket.
Rahane stitched together a 62-run stand with Sanju Samson (37) for the third wicket while wicketkeeper Jos Buttler (29) and Tripathi joined hands for another important partnership of 38 runs for the fifth wicket. When Roy was joined by Pant, the pair quickly proceeded to take the game away from the hosts. Gambhir's miscued pull eventually worked to their advantage, because Pant unleashed a flurry of reverse sweeps and paddles to take the pressure off Roy. With 11 needed off the last over, he had smashed Bangladesh's Mustafizur Rahman over cover for four and swung him backward of square for six.
Daredevils debutant Jason Roy led the chase with an unbeaten 91 - he faced the first and last ball of the chase - and was supported by Rishabh Pant and Shreyas Iyer as the visitors left the Wankhede with their first points in the bag. It was an innings of not only great hitting, but also shouldering responsibility when the likes of Glenn Maxwell failed to finish the game off. He said "Yesterday while we were coming back to the hotel he (captain Rohit Sharma) said we would love if you open the innings as you have played a lot of cricket here and you are most experienced".