Welcome to our live report of the fourth day of the first India-England Test from Chennai. Join us for updates, analysis and colour. You can find our traditional ball-by-ball commentary here

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10.20am: Leach strikes

Nothing much happening with the new ball for England's seamers, so Root throws the new ball to Jack Leach less than five overs after it has been taken. He strikes with his second delivery: extra bounce from a length with the harder ball which takes Ashwin by surprise as he lunges forward, hoping to smother the spin, and the ball loops up towards the vacant silly point region. Jos Buttler gets across to take the catch, and the 80-run partnership is broken. Shahbaz Nadeem, at No. 9, is still a useful batsman, but England are into the tail.

9.50am: Easy pickings

Poor start from England's spinners, and for Bess in particular. Too many balls were either overpitched or back-of-a-length in his three overs this morning, and India have added 27 in six overs, with Sundar reaching his second Test fifty with a cover drive off Leach. The new ball is available: if these two can survive the first 10 overs or so against it then India will grow increasingly confident that this Test can be saved.

9.15am: New ball looms

A useful unbroken stand of 32 between R Ashwin and Washington Sundar last night has given India hope of avoiding the follow-on, but there are only six overs until the new ball is due this morning, and England will be hopeful that James Anderson and, in particular, Jofra Archer can break the stand when it arrives. With 15 minutes to go until we get underway, there's plenty of time to catch up on last night's Polite Enquiries below, or any of the rest of our overnight content.