The win got Delhi five points, which easily could have been six points had Delhi attained the target of 16 runs without losing a wicket.
But Unmukt, who is going through a terrible patch at the moment, played wrong line to an Abhishek Bhatt delivery which saw his off stump go for a walk.
Skipper Gautam Gambhir could only watch in disgust as Delhi blew the easiest chance to get a bonus point having dismissed Saurashtra for 240 in the second innings.
Starting the day at 163 for six, Saurashtra added another 77 runs before losing the remaining six wickets in only 31.3 overs. With Narwal breaching through the defences of Sheldon Jackson (51, 6x4) and Divyaraj Chauhan (21), it was a matter of time before young Navdeep took the stuffing out of the tail to polish off the tail.
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Narwal was certainly best player of the match with a haul of six wickets and a half century.
Brief Scores: Delhi 442 & 16/1.
Saurashtra 217 & (f/o) 240 in 90.3 overs (Sheldon Jackson 51, Navdeep Saini 3/27, Sumit Narwal 3/41). Delhi won by 9 wickets.
Points: Delhi 5 Saurashtra 0.