Defending Ranji Trophy champions Karnataka registered their second outright win in the tournament when they defeated Odisha by an innings and 64 runs in Mysore.
Skipper Biplab Samantray socred 100 and bagged two wickets as Odhisha edged past Goa by one run in a nail-biting quarter-final tie.
Sunrisers' skipper Cameron White could not impress on the day getting out for a golden duck but ably led his side to a fine win. With the win, they also inch a step closer to playoff qualification - they just need to beat Kolkata Knight Riders on Sunday.
Niranjan and Samantray, the two overnight batsmen, denied a breakthrough for more than 30 overs in the day before the former was out. The duo stitched 121 runs for fourth wicket. Niranjan's 103 came from 254 balls and contained 11 fours.
Bengal speedster Ashok Dinda's hostile spell of fast bowling helped defending champions East Zone reach the final of the Duleep Trophy for the second successive time after beating South by virtue of 23-run first innings lead.
The first semifinal of the Duleep Trophy between defending champions East Zone and South Zone is interestingly poised with the former scoring 126 for six in their second innings to enjoy a slender 152-run lead at stumps on day 3 here on Tuesday.
Orissa all-rounder Biplab Samantray's fine spell kept defending champions East Zone in hunt for a berth in Duleep Trophy final as South were precariously placed at 134 for five at stumps on the second day after bowling out their opponents for 267.