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Group 1 results: Essex beat Durham by 44 runs, Warks beat Notts by three wickets, Worcs draw with Derbys
Group 2 results: Hants beat Middlesex by 249 runs, Glos beat Somerset by eight wickets, Surrey draw with Leics
Group 3 results: Yorks beat Kent by 200 runs, Lancs beat Northants by 206 runs, Sussex beat Glam by eight wickets
Derbyshire 390 & 312-5 dec v Worcestershire 305 & 33-2
A wicket right on lunch for Derbyshire as Worcestershire's Jake Libby is bowled by Fynn Hudson-Prentice.
Libby goes for 21 off 54 balls. Derbyshire need another eight wickets to win.
Hampshire 319 & 290-4 dec beat Middlesex 79 & 281 by 249 runs
A resounding victory for Hampshire.
Liam Dawson dismisses Ethan Bamber for 24 to wrap up a comprehensive 249-run win for Hampshire at Southampton.
It was in the first innings the game was won and lost, you have to say, with Middlesex bowled by 79 after that amazing spell from Mohammad Abbas.
Somerset 312 & 149 v Gloucestershire 309 & 147-2
James Bracey (79 not out) and Tom Lace (16 not out) have edged Gloucestershire to within one swipe of the willow of victory.
They're on the verge of a first County Championship win at Taunton since 1993.
Kent 265-9 & 113-5 v Yorkshire 379 & 330-5 dec
Kent night watchman Matthew Milnes hasn't put a foot wrong so far as he blocks out another Dom Bess maiden.
Milnes is on 41 not out, two away from his highest First-class score.
You feel if Yorkshire get one, the final wickets won't be too far away.
Nottinghamshire 273 & 260 v Warwickshire 201-9 & 166-3
Stuart Broad comes in for another spell just before lunch.
He seems fired up, sending in three bouncers in a row to Sam Hain who ducks well.
The Bears batter remains not out on 55. Matthew Lamb has 39 at the other end.
This game is in the balance with Warwickshire needing another 167 to win.
Derbyshire 390 & 312-5 dec v Worcestershire 305 & 27-1
One game finished. Eight more to go.
There's been a breakthrough for Derbyshire as Matthew Critchley has Daryl Mitchell caught behind by Billy Godleman.
That's six wickets in the match for Critchley who took 5-67 in the first innings.
Advantage Derbyshire.
Essex 96 & 330 beat Durham 259 & 123 by 44 runs
Game over! Jamie Porter wraps up Essex's victory, bowling Matt Salisbury for two.
Having been bowled out for 96 on the first day and seen Durham cruise to 83-3 in pursuit of 168, that's a remarkable fightback from the hosts at Chelmsford.
Simon Harmer was again the key man, taking 5-57 to finish with 10 wickets in the match.
A classic win for the county champions.
Somerset 312 & 149 v Gloucestershire 309 & 123-2
At Taunton, meanwhile, Gloucestershire continue to edge towards victory themselves.
James Bracey has moved onto 69, with Tom Lace merely playing a supporting role on two from 25 deliveries.
Just 30 more required with eight wickets in hand.
Durham 121-9, still need 47 more runs to win
Bryon Carse was just starting to counter-attack for Durham, hitting a couple of boundaries to move onto 15, but his fun is put to an end by Simon Harmer.
Harmer pins him in front to take his fifth wicket of the innings and 10th of the match.
He's nearly singlehandedly dragged Essex towards victory here. One more wicket needed.
Nottinghamshire 273 & 260 v Warwickshire 201-9 & 157-3
A brilliant, dogged display from Warwickshire's Sam Hain who reaches his 50 off 117 balls with six fours.
The Bears also pass 150 and are just 176 runs off victory on a batting-friendly surface.
Who predicted this situation when Will Rhodes fell cheaply late last night?
Lancashire 305 & 296-7 dec v Northamptonshire 177 & 96-6
A second dismissal for Matthew Parkinson who traps Northamptonshire's Saif Zaib leg before for four.
Lancashire are four wickets away from their first win of the season.
Surrey 672-8 dec v Leicestershire 375 & 84-2
Is there still some life in the game at The Oval?
Jordan Clark takes two wickets in two balls, Sam Evans and Harry Dearden his victims, to give Surrey some renewed hopes.
Leicestershire trail by 213 runs.
Derbyshire 390 & 312-5 dec v Worcestershire 305 & 22-0
Worcestershire's openers Daryl Mitchell (eight not out) and Jake Libby (12 not out) have looked unfazed so far.
The visitors are a mammoth 376 runs behind. A win's out of the question. Batting for a draw is the way to go.
Durham 108-8, still need 60 more runs to win
Four wickets for Simon Harmer and Durham are eight down.
Ned Eckersley's stay is over, clipping the spinner straight to leg slip, and Essex are closing in on victory.
Gloucestershire 101-2, still need 52 more runs to win
Image source, Getty ImagesA superb innings - and match - for Gloucestershire's James Bracey.
Having struck 118 earlier in the contest, he's now brought up a half-century as the visitors edge ever nearer to their victory target of 153.
He's also moved Gloucestershire into three figures.
Nottinghamshire 273 & 260 v Warwickshire 201-9 & 124-3
Sam Hain (39 not out) and Matthew Lamb (18 not out) have been superb this morning for Warwickshire as Nottinghamshire's fiery attack of Stuart Broad and co. have been unable to prize a wicket this morning.
The pair have dug in and the Bears are now just 209 runs off victory.
Of course, one wicket and things could change quickly.
Hampshire 319 & 290-4 dec v Middlesex 79 & 245-9
Kyle Abbott removes Nathan Sowter lbw for nine and Hampshire need just one more wicket for victory.
Durham 100-7, still need 68 more runs to win
Durham bring up three figures, meaning they need 68 more runs for victory with three wickets in hand.
Brydon Carse is unbeaten on two, Ned Eckersley on seven.
Kent 265-9 & 86-5 v Yorkshire 379 & 330-5 dec
Kent are another side in all sorts of trouble as Jordan Thompson grabs his third wicket of the innings, he's got figures of 3-8.
Jack Leaning didn't last long, edging behind for a six-ball duck.
Kent need 359 runs with five wickets left. This should be a Yorkshire win you'd think.
Gloucestershire 89-2, still need 64 more runs to win
They couldn't... Could they?
Kraigg Brathwaite chases a wide one from Marchant de Lange but ends up chopping onto his own stumps.
Gloucestershire are still absolutely in the box seat, but it's a wicket that has given Somerset just a glimmer.
Image source, Getty Images