Electing to field at the Palam B Ground, Model Sports Complex, Vidarbha bowlers justified the think-tank's decision to pack the Andhra side in 25.3 overs.
Sharing the new ball with Umesh, left-arm pacer Shrikant Wagh trapped opener Koripalli Sreekanth for nought to start the batting rot.
Umesh soon joined in the party with three scalps as left-arm spinner Akshay Karnewar, who wiped off the tail in double quick time, managed to be the destroyer-in-chief.
Chasing the paltry score, openers Jitesh Sharma (47 not out) and Faiz Fazal (44 not out) made short work of the target in 19.2 overs.
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Vidarbha are in a strong position to move into the quarter-finals with four wins from five matches, while Andhra are on a slippery ground with just two wins from their five outings.
Brief Scores:
Andhra Pradesh 87 all in 25.3 overs (Prasanth Kumar 38, Kuppu Ganesh Kumar 17; Akshay Karnewar 4-13, Umesh Yadav 3-16)
Vidarbha 91/0 in 19.2 overs (Jitesh Sharma 47 not out, Faiz Fazal 44 not out; Siva Kumar 0-13)