Batting first, Mumbai scored 155 for eight in 20 overs with Dubey's 41 off 40 balls and Sarfaraz Khan's 26 off 20 balls enabling the tournament favourites to cross the 150-run mark.
In reply, Vidarbha were restricted to 140 for six with in-form left-arm spinner Shams Mulani (3/21 in 4 overs) and Dube (2/20 in 3 overs) choking the run flow.
Earlier, Shaw (19 off 13 balls), who had blazed his way to 134 off 61 balls in the last game, had smashed three fours and a six before being castled by India international Umesh Yadav (2/38).
However, it was left-arm spinner Aditya Sarwate (3/28) who put the brakes in the middle overs, and even a big hitter like Dube had to play the waiting game.
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