Eng 179-1published at 29.4 overs
Ooof, Pope gets through his shot early and Siraj bouncer strikes him on the temple. He's wearing a helmet of course, and appears to be fine, but we'll have a break for the concussion checks.
Summary
Duckett hits sublime unbeaten 133 as England close on 207-2, trailing by 238
Pope trapped lbw on review by Siraj for 39
Ashwin dismisses Crawley to reach 500 Test wickets
India 445: Rohit 131, Jadeja 112, Sarfaraz 62; Wood 4-114
Third Test, day two, Rajkot - series level at 1-1
Eng 179-1published at 29.4 overs
Eng 176-1published at 29 overs
Duckett is loving his sweep shots today, his pads are going to need a good scrub at the close of play.
A reverse and then an uppish conventional sweep both bring four. Oooh, but there's a chance - the England opener inside edges but it flies over the top of his stumps.
Eng 163-1published at 28 overs
Duckett 108, Pope 32
Pope ends a quieter Siraj over by whipping one through fine leg.
Jadeja tries to cut off the boundary with one foot then the other, but the ball spills onto the sponge. Use your hands, Ravindra...
How's stat?!published at 10:44 Greenwich Mean Time 16 February
Image source, Getty ImagesMatt (see 10:30 GMT) asked earlier whether Duckett's century was the earliest a batter has got to the landmark in an innings.
He got there after 25.5 overs.
It's not the easiest stat to check but I can tell you Chris Gayle reached a century against Australia after 23.4 overs in 2009 so it's definitely not a record.
Eng 156-1published at 27 overs
Ollie Pope is yet to play white ball cricket for England but there was some T20-esque batting flavouring his game in this over.
He reverse sweeps Jadeja, who's changed ends, for four and follows up with an outrageous ramp shot to pop the ball over the wicketkeeper's head for another boundary. He wasn't even looking at the ball!
Jadeja then thinks he has Pope's wicket, but the umpire says no to the lbw and Rohit doesn't fancy reviewing it. Replays show it was going down leg.
Postpublished at 10:40 Greenwich Mean Time 16 February
Michael Vaughan
Former England captain
Image source, Getty ImagesThat is one of the great Test hundreds.
Bumrah and Ashwin are two of the great bowlers and Duckett has dealt with them.
Eng 148-1published at 26 overs
And to cap off the over he crashes another four through mid-wicket!
Postpublished at 10:36 Greenwich Mean Time 16 February
Phil Tufnell
Former England spinnerBoom. What a knock. Sensational stuff from Duckett. Off the seamers or off the spinners. India have had no answer.
Hundred for Ben Duckettpublished at 25.5 overs
Eng 144-1
There it is! The fastest English century against India!
Four Siraj dot balls saw Stokes and a few others slip by, but he guides Bumrah's fifth down the ground for four. His century comes from 88 balls, the joint-eighth fastest by an England batter in Test cricket.
Duckett punches the air as he runs down the wicket - he's delighted, as well he should be.
Postpublished at 10:34 Greenwich Mean Time 16 February
He's not there yet, Matt.
Duckett needs to score two from his next ball to become England's outright fourth fastest centurion. Do it from his 85th and he'd share the record with Ben Stokes, who reached triple figures from that number of deliveries against New Zealand in 2015.
Meanwhile Mohammed Siraj is replacing Ravindra Jadeja after one over.
get involved Get Involvedpublished at 10:30 Greenwich Mean Time 16 February
#bbccricket, via WhatsApp on 03301231826 or text 81111 (standard network charges apply)
What's the fastest a batter has hit a century by balls faced from the start of the team innings? Duckett within (hopefully, no mockers) 25ov must be up there.
Matt, curious
Postpublished at 10:30 Greenwich Mean Time 16 February
Michael Vaughan
Former England captainI am amazed teams don’t take the ball away from the England batters eyeline. Bowl wide tor a few overs knowing they don’t leave many.
Eng 140-1published at 25 overs
Pope brings up this pair's fifty partnership, nudging Bumrah into the covers. He's knocked to his feet as he reaches the non-striker's crease, as Jadeja's throw raps his heels.
This pair have reached the landmark from 66 deliveries.
Eng 138-1published at 24 overs
India finally bring Ravindra Jadeja into their attack, replacing Ashwin.
A tidy first over sees just one single conceded, as Pope turns a single into the leg side.
Postpublished at 10:22 Greenwich Mean Time 16 February
Jonathan Agnew
BBC cricket correspondent
Image source, Getty ImagesIt has been a remarkable innings by Duckett, who has probably been the main beneficiary of the liberating attitude of Stokes and McCullum. I remember him scratching around when he last toured the subcontinent, abandoning his natural game. What a transformation. Cricket is indeed a mind game.
Eng 137-1published at 23 overs
Guess what - it's another four for Ben Duckett, sending Bumrah's delivery whistling back down the ground with an on drive to move to 97.
Postpublished at 10:15 Greenwich Mean Time 16 February
Michael Vaughan
Former England captain
Image source, Getty ImagesDuckett is sweeping India’s best balls. This is an incredible innings. India are in a state of shock. They have had no answers as yet.
Eng 131-1published at 22 overs
It just keeps going!
Duckett follows the six with a four, whipping a bit of a gimme ball through square leg. He then turns Ashwin's final delivery round the corner, but the ball is cut off at the boundary by a chasing Jadeja - just three from that one.
The England opener is on 92 from 75 balls.
Eng 124-1published at 21.4 overs
Ben Duckett is seeing it like a beach ball.
He crashes Ashwin over mid-wicket for six with a meaty slog sweep.
Not outpublished at 21 overs
Eng 117-1
A good call from Dharmasena, replays show the ball skimming the bottom of Duckett's bat on the way through to his pads.
Had it reached them cleanly I think he might have been in trouble...