After drawing with defending champions Karnataka, Assam beat former back-to-back winners Rajasthan by an innings, and then toppled Haryana at home in Lahli and are now on the cusp of beating Delhi.
Assam still have seven wickets in hand to overwhelm Delhi's target with opener Rahul Hazarika batting on 30 in the company of AB Arun Karthik (13 not out), who made vital 81 in the hosts' first innings.
Resuming at the overnight score of 101 for four, Delhi last seven wickets contributed just 71 runs with spin duo of Jamaluddin Syed Mohammad (3/49) and Amit Verma (3/42) inflicting bulk of the damage.
Paceman Krishna Das (2/32) and skipper Gokul Sharma (2/17) also chipped in with wickets to help their side's cause.
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Overnight batsmen Pulkit Narang (26 not out) and Milind Kumar (20) got starts but apart from them Delhi's middle and lower order struggled against the spin duo of Syed Mohammad and Verma.
Manan Sharma (1/11), Navdeep Saini (1/18) and Pradeep Sangwan (1/24) picked up a wicket each for Delhi.
Brief Scores:
Delhi: 149 & 172 all out in 83.2 overs (Unmukt Chand 44, Dhruv Shorey 38; Amit Verma 3/42, Jamaluddin Syed Mohammad 3/49).
Assam: 157 & 70 for three in 32 overs (Rahul Hazarika 30 not out; Manan Sharma 1/11).