After bowling out Mumbai for a paltry 141 in the first innings, Tamil Nadu posted a healthy 417 in their first innings with help of Baba Indrajith's maiden first-class ton in his 10th match.
Indrajith coming in at No 8 scored 101 off 162 balls with the help of 11 boundaries and a six as Tamil Nadu gained a mammoth 276 runs first innings lead.
At stumps, Mumbai were 12 for one needing another 264 runs to avoid innings defeat with two days to fight it out on a track which certainly improved after the first day when left-arm spinner Rahil Shah ended with career-best figures of 7 for 34.
Tamil Nadu 1st Innings: 417 (Baba Indrajith 101, Vijay Shankar 95).