Kohli hit a four just before H Sangwan sent his stumps cartwheeling.
Nair's runs have powered Vidarbha into the final of the Vijay Hazare Trophy tournament, where they will take on Karnataka in Vadodara on Saturday.
Karnataka won their fifth Vijay Hazare Trophy title, defeating Vidarbha by 36 runs in a high-scoring final. Smaran Ravichandran's stylish century (101 off 92) and Abhinav Manohar's blistering 79 off 42 propelled Karnataka to a commanding total of 348 for 6. Dhruv Shorey's third consecutive century (110) went in vain for Vidarbha, who were all out for 312 in 48.2 overs despite Harsh Dubey's explosive 63 off 30 balls.
Shardul Thakur's second first-class hundred brought Mumbai back from the brink in their Elite Group A clash against Jammu and Kashmir at MCA BKC Ground in Mumbai on Friday.
Shardul Thakur emerged as the unlikely hero for Mumbai on the opening day of their Ranji Trophy Elite Group A
Mumbai will now need to beat Meghalaya by a big margin and hope for favourable results in other matches to keep their quarter-final hopes alive.
At stumps, Nair was still at the crease with Harsh Dubey (19 not out) for company.
'I had prepared myself for this. I was getting dismissed (after half-centuries) so my plan was to play as much as I can with the straight bat and keep it simple after reaching fifty.'
There was a major security lapse at the Ferozshah Kotla ground in New Delhi on Saturday as fans barged into the field of play on Day 3 of the Ranji Trophy match between Delhi and Railways to get near batting star Virat Kohli.
14-year-old Mumbai opener Ira Jadhav became the first Indian to score a triple hundred in Under-19 cricket, when she made a 346 against Meghalaya in the Under-19 Women's One-Day Trophy
Skipper Ankit Kumar's brilliant century put defending champions Mumbai on the back foot as Haryana reached 263 for five at stumps on the second day of their Ranji Trophy quarter-final.
Dubey said he did not try anything different for his record wicket haul but credited the feat to getting a regular run in the premier domestic tournament.
But they seemed to learn nothing from their past mistakes.
Vidarbha head coach Usman Ghani lauded the young players for their performances in the team's third Ranji Trophy triumph.
Karnataka ended the Ranji Trophy season with a draw against Haryana in their Elite Group C match in Bengaluru on Sunday.
Virat Kohli's unmatched aura dominated the Ranji Trophy fixture between Delhi and Railways at the Arun Jaitley Stadium, in Delhi, on Thursday.
Vidarbha took a commanding 297-run lead against Tamil Nadu on Day 4 of their Ranji Trophy quarter-final on Monday.
Vidarbha won their third Ranji Trophy title after the final against Kerala finished in a draw in Nagpur on Sunday.
Jammu and Kashmir skipper Paras Dogra expressed frustration with the umpiring standards during their Ranji Trophy match against Mumbai.
Rohit Sharma's fiery knock was cut short by Yudhvir Singh, as he was caught at midwicket for a fluent 28 runs off 35 balls.
This was Mumbai's second SMAT title after winning it for the first time in 2022, while MP's wait for a maiden trophy prolonged to another season.
Former winners Vidarbha will rely on their red-hot form to stake claim for a title they last won over five years ago, while first-time finalists Kerala will be driven by grit when the two contrasting teams clash in the summit showdown for the 90th Ranji Trophy, starting in Nagpur on Wednesday.
'Musheer Khan brings up his 100,' BCCI Domestic posted while sharing the clip. 'A special celebration and a special appreciation from brother Sarfaraz Khan.'
Services achieved the second highest successful run-chase in Ranji Trophy history as they overhauled a 376-run target against Odisha.
Kotian has fond memories of the Melbourne Cricket Ground where he scored 44 batting at No. 8 for India A and looked the part.
Captain Shreyas Iyer and Devdutt Padikkal struck half-centuries to help India D stretch their lead against India C on the second day of their Duleep Trophy match.
India pacer Mohammad Shami, playing his third game of the tournament, went for runs as he took 3/61 in 10 overs.
Aditya Thakare's impressive four-wicket haul left Tamil Nadu struggling at 159 for six after the second day of their Ranji Trophy quarterfinal match against Vidarbha.
Kerala pacer Nidheesh takes fifer to reduce J&K to 228 for 8
Facing Kerala in the quarter-finals in Pune from February 8, J&K will be looking to script history as they aim to make it to the Ranji Trophy semi-finals for the first time ever.
Earlier, Akash Anand completed his second first-class century and shared a 69-run stand with Tanush Kotian (33) to lead Mumbai's recovery after they ended the second day at 188 for seven.
Shams Mulani and Tanush Kotian together claimed six wickets for only 23 runs to put Mumbai within sniffing distance of the Irani Cup triumph despite Abhimanyu Easwaran's heroic 191.
Sarfaraz became the first cricketer to score a double century for Mumbai in the Irani Cup, solidifying his reputation as a formidable batsman.
All-rounder Shams Mulani starred with the ball to spearhead India A's remarkable recovery against India D on Day 1 of the Duleep Trophy match.
Rohit Sharma's poor form in red-ball cricket continued as he fell for a 19-ball 3 before Mumbai conceded a first-innings lead against Jammu and Kashmir
There was no doubt about him getting the player of the match award as Vipraj also was the pick of the bowlers with 2 for 20 with his leg-breaks.
Riyan Parag and Shaswat Rawat struck fluent half-centuries to help India A tighten their grip over India C on the penultimate day of the four-day Duleep Trophy final round match in Anantapur on Saturday.
Jammu and Kashmir caused a major upset in the Ranji Trophy as they shocked defending champions Mumbai by five wickets on Saturday.
Round-up of the matches across various venues in the Ranji Trophy
Mumbai reach SMAT final after Ajinkya Rahane's sublime 98 powers them to 6-wicket win over Baroda