Rahul went on to play a knock 62 runs against West Indies and as a result, he became just the seventh Indian batsman to go past 1000-run mark in T20Is.
West Indies scored 207 for 5 but India rode on superb innings from Virat Kohli (94 not out) and KL Rahul (62) to overhaul the target, scoring 209 for four in 18.4 overs.
The Indian pace attack looks menacing with the return of Bhuvneshwar Kumar and Mohammed Shami.
Sent into bat, Karnataka made a challenging 180 for five, riding on skipper Manish Pandey's 45-ball unbeaten 60.
Mithun who finished with figures of 5/39, did not have a great day with the ball until the last over as he removed Himanshu Rana (61) and Rahul Tewatia (34) off the first two balls.
After hitting 52 against Bangladesh in the third game of the T20I series, Rahul has now shown great form in the Syed Mushtaq Ali as well as he has scored two fifties in six games.
KL Rahul hit an unbeaten 84 off 48 balls to power defending champions Karnataka to victory against Punjab.
It can be noted that the selectors are trying out players in different roles. After fast and spin bowlers, wicketkeepers and middle-order batsmen, this might be time to look at some opening options.
Iyer made the most of a reprieve on nought when dropped by Aminul Islam off Shafiul to bring up his maiden T20 fifty and went on to score 62 off 33 deliveries.
The management also handed Prateek Jain a debut in the final, against Tamil Nadu, for his left-arm pace instead of a regular in Ronit More; a bold call in a pressure game.
Nidhhi opened up about her relationship status during a conversation with Lakshmi Manchu on VOOT's "Feet Up with the Stars Telugu".
"There's no mercy, even for the guys who play for the same country - he's always very competitive," the right-hander said about his teammate.
Rahul has not been able to score runs in recent times. In the two-Test series against the West Indies, he managed scores of 44, 38, 13 and 6 and didn't seem to be in any sort of form.
Promotion to top likely for Mumbaikar in South Africa series with Rahul set to get axe; Gill in contention for third-opener slot.
Test Squad against South Africa: Rohit likely choice for opening slot, Abhimanyu Easwaran dark horse
Easwaran, a prolific performer at the domestic and India A games, could be rewarded with a place in the side as a reserve opener, if the selection committee decides to drop Rahul.