- At the end of Day 1, England were 196 for 2.
- Debutant Keaton Jennings smashed a ton on the opening day.
England were going strong by taking tea at 196 for two but India reduced the visitors to 288 for five at stumps as Ashwin removed Moeen Ali (50) and Jennings (112) in space of three balls and later got rid of Jonny Bairstow (14).
Ben Stokes (25) and Jos Buttler (18) were the unbeaten batsmen at close after an unfinished stand of 39 on a track that would be difficult to negotiate with passage of time.
Post-tea, Ashwin made the ball talk by extracting turn and bounce from the Wankhede Stadium track and ended with figures of four for 75. England skipper Alastair Cook (46) was dismissed by left-arm spinner Ravindra Jadeja (1/60) in the opening session.
Other Indian bowlers - medium pacers Bhuvneshwar Kumar and Umesh Yadav and third spinner Jayant Yadav ended the day wicket-less after bowling a combined 43 overs.
The tourists are 0-2 down in the series and need to win this game to keep it alive for the fifth and final Test, scheduled in Chennai from December 16.
Jennings, born in Johannesburg, showed no nerves as he became the 19th batsman from England to make a century on debut against India. It was also the fifth time that a batsman achieved the feat against the hosts since 2010.
Jennings, who had come in as replacement for the injured teenaged batsman Haseeb Hameed after the third game, took full advantage of two close shaves early on, including a dropped catch when he had not even opened his account.
He added 99 runs for the first wicket with captain Cook, 37 for the second with Root and 94 for the third with Ali.
Joe Root was sent back by Ashwin through a smart catch at slip by home team captain Virat Kohli after Cook had been stumped by Parthiv Patel off Jadeja.
The tourists looked well-poised for a big score at the end of session two when Ashwin, who bowled far better after switching ends, clipped the high-flying England’s wings by packing off Ali.
Ali top-edged a sweep and was caught at mid-wicket soon after completing his half-century in 104 balls. Two balls later, Jennings, son of renowned coach Ray, was caught brilliantly by a diving Cheteshwar Pujara at gully.
Jennings had played some audacious reverse sweeps too, including when on the cusp of his landmark, to reach the hundred in 186 balls and laced with 12 fours.
More trouble followed for England when Bairstow, stonewalling with Stokes, was tempted into playing a sweep and top-edged to long leg as the visitors slumped to 249 for five.
It left the sixth wicket pair of Stokes and Buttler to do the resurrection job till close of play.
Last Updated 31, Mar 2018, 6:31 PM