Defending champions Surrey draw with Essex after being set 273 to win.
Chris Rushworth has match figures of 10-76 as Warwickshire beat Hampshire
Notts hang on for draw with Lancashire with one wicket left.
Sam Whiteman scores unbeaten 130 as Northants draw with Somerset
Jonny Bairstow out for nought for Yorkshire against Glamorgan, Adam Lyth hits 174
Ollie Robinson takes 7-48 - and 14 wickets in the game - but Sussex draw at Worcester
Leicestershire extend their unbeaten record with draw at Derby.
Surrey 103-6 - target 273
Is that three in the over for Simon Harmer? A huge appeal from the Essex fielders but Cameron Steel survives.
A double wicket maiden for the South African, who took a brilliant slip catch to remove Rory Burns earlier in the innings. There are 25 overs to go.
Somerset 412 v Northants 255 & 299-8
There's an excellent field at Taunton, as Jack Leach looks to take Ben Sanderson's wicket.
Two slips, a leg slip, silly mid-off and silly mid-on are all stationed around the batter, waiting to pounce on the slightest of mistakes.
Sanderson is untroubled though, defiantly blocking Leach out to mid on.
Worcs 264 & 238-8 v Sussex 373
Image source, Rex FeaturesSussex's hopes of victory might be disappearing over the horizon - or into the changing-room, to be more accurate, as an exhausted Ollie Robinson heads off the field.
The seamer's put in a gargantuan effort, with 28 overs bowled in this second innings - 14 wickets to his name in the match - and he's on course for the best figures of his career.
Today has been all about Robinson and Azhar Ali, really - the Pakistan batter's tireless 92 not out will be the key if Worcestershire save this game. They lead by 129 with 22 overs left.
Surrey 103-6 - target 273
Image source, Rex FeaturesBig turn for Simon Harmer and Ben Foakes is right in front.
The Surrey keeper departs for a two-ball duck. Time for the defending champions to try and shut up shop?
Surrey 103-5 - target 273
How do Surrey approach this now?
Simon Harmer comes on from the River End for his first over and Sean Abbott holes out at long-on from his first delivery.
England's Ben Foakes comes to the crease with 170 needed from 25.5 overs.
Derbys 350-7 dec v Leics 122 & 244-7
Mark Watt returns for a new spell and Chris Wright strikes his third ball cleanly over mid-off for six. He progresses into the 30s.
Somerset 412 v Northants 255 & 298-8
Another excellent catch down the leg-side from James Rew, and Tom Taylor has to go.
It's a glance off the middle of the bat, which Taylor doesn't get enough on to get it past Rew, who dives away to his left and takes it two-handed.
Is there life in this game yet? Northants lead by 141.
Surrey 100-4 - target 273
Sean Abbott pulls the first ball of a new Sam Cook over.
He doesn't make proper contact and the ball isn't far away from diving keeper Michael Pepper as it heads for the boundary.
That's much more like it as Abbott punches it away square on the off-side for the second four of the over.
We still haven't seen Simon Harmer enter the attack.
Derbys 350-7 dec v Leics 122 & 238-7
Image source, Rex FeaturesPeter Handscomb passes 50 for the fourth time as a Leicestershire player with a boundary, pulled away off Henry Brookes. It has taken him 70 balls and he also has a half-century partnership with Chris Wright, who has 27. The visitors lead by 10.
Notts 108-6 (target 295) v Lancs
Still no breakthrough for Lancashire after tea - and Nottinghamshire's hopes of saving the game have been boosted by the efforts of this seventh-wicket pair.
Joe Clarke has just steered George Balderson to the third man boundary to bring up the 50 partnership and he's 32 not out, with Brett Hutton on 17.
Still 23 overs left...
Surrey 92-4 - target 273
Sam Cook tries to surprise Jamie Smith with a bouncer.
He succeeds, but also does the same to keeper Michael Pepper and the ball rolls away for four byes.
Smith takes a single to end the over and is 17 not out.
Somerset 412 v Northants 255 & 294-7
Tom Taylor guides Kasey Aldridge to the third boundary for four and passes 50.
He's batted very nicely indeed, supporting Sam Whiteman where others couldn't.
Derbys 350-7 dec v Leics 122 & 231-7
Singles only for Leicestershire since they cleared their deficit.
They are three runs ahead but there are, potentially, 24 more overs in the game.
Somerset 412 v Northants 255 & 285-7
Northants' eighth wicket partnership between Sam Whiteman and Tom Taylor is now worth 66.
Priceless runs, which have blunted Somerset, and gone a long way towards earning Northants a draw.
Worcs 264 & 228-8 v Sussex 373
One last effort from Ollie Robinson - who's gone above and beyond for Sussex in this match - and his first ball pierces the defences of Joe Leach.
Seven wickets in the innings for Robinson, 14 in the match - and this one just can't be put to bed quite yet!
Worcestershire lead by 119 and there are 26.5 overs remaining.
Yorks 281-4 - target 492
James Harris gets on to straighten and pins Dawid Malan lbw.
Saud Shakeel trots out to join Adam Lyth.
Surrey 83-4 - target 273
Shane Snater strikes again as Will Jacks clips a catch to short mid-wicket. Good field placement by Essex skipper Tom Westley.
No giving up on the chase by Surrey, though, as Aussie Sean Abbott is promoted up the order to come in at six.
Derbys 350-7 dec v Leics 122 & 228-7
Leicestershire achieve parity as Chris Wright finds the extra cover boundary at the start of a new Luis Reece over. He is 26 not out and Peter Handscomb has 43 - their stand is currently worth 47.
Surrey 80-3 - target 273
A fine over by Sam Cook to Will Jacks brings him a maiden. Surrey need another 193 from 32 overs.
Yorks 260-3 - target 492
Adam Lyth nudges Michael Neser to backward point and picks up a single that takes the Yorkshire captain to 150 from 192 balls.
He's batted superbly all day, and is taking Yorkshire to a well-earned draw.
Image source, Getty Images