After bundling out Services for 151, Mumbai made short work of their chase to gallop to their target in 25.2 overs.
Electing to field at the Rajiv Gandhi International Stadium, Uppal, Mumbai bowlers made it count with new-ball bowler Shardul Thakur picking up four wicket.
Dhawal Kulkarni, Shashank Singh and Iqbal Abdullah also chipped in with two wickets each as Services batting folded in 42.1 overs.
Opener Nakul Verma struck a patient 50, while Rajat Paliwal (41) and Saumya Swain (28) also made significant contributions as rest of the Services batsmen failed to manage double figures.
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Off-spinner Azaruddin Bloch bagged two wickets.
Brief Scores:
Services 151 all out in 42.1 overs
Mumbai 156/4 in 25.2 overs (Akhil Herwadkar 46, Shreyas Iyer 35; Azaruddin Bloch 2-27)
Points: Mumbai 0, Services 4.