Seven games: five in Division One, two in Division Two
Division One leaders Surrey at home to Essex
Second-placed Hampshire play Gloucestershire at Cheltenham
Notts, leaders of Div Two, away to Derbyshire in East Midlands derby
Somerset 210-4 v Yorkshire
This is something else from Tom Kohler-Cadmore.
Dom Bess tosses one up, Lewis Goldsworthy goes to drive and edges it to slip where Kohler-Cadmore makes a brilliant one handed pouch with his left.
The future Somerset player with the catch from the ex-Somerset bowler.
Warwickshire 110-3 v Kent 165
Ben Watts
BBC Radio Kent
I'm starting to see what the ‘Sam Hain for England’ hype is about, the way he’s played the pace of Henry & Saini.
Very few mistakes in his knock so far and good shot selections.
Surrey v Essex 271 all out
Dan Worrall ends Essex's first innings to finish with figures of 6-56.
It's another lbw as last man Jamie Porter goes without scoring.
Essex will probably be delighted with getting up to 271 having been 91-6 at lunch.
Image source, Rex Features
Derbyshire v Notts 374-1
Ben Duckett goes to his double century as Notts continue to pile on the runs at Derbyshire.
His stand with Haseeb Hameed is now worth 328 and they're not done yet.
Duckett is also closing in on 1,000 Championship runs for the season. He needs another 26.
A fourth double hundred of his career, and this has come at a fair lick, off only 224 balls.
Warwickshire 108-3 v Kent 165
The light has deteriorated in Birmingham and the floodlights are now on.
I'm not sure there will be too many complaints from the players if liquid starts falling from the sky anytime soon.
Surrey v Essex 262-9
A century and out for Adam Rossington.
The Essex batter skies Kemar Roach and Rory Burns holds the catch at long on.
A marvellous innings comes to an end.
Middlesex v Sussex 278-2
Century number five of this incredible season for Cheteshwar Pujara.
The India batter hasn't quite reached his average for this campaign though - that's now above 123!
Surrey v Essex 262-8
Adam Rossington flicks a full toss from Kemar Roach to the fielder on the boundary but he oversteps moving backwards and it's six.
Rossington then goes to a brilliant century with another couple. It's his first for Essex.
Surrey v Essex 253-8
Adam Rossington launches Kemar Roach for back-to-back sixes including a flick off one knee into the leg-side. The Essex wicketkeeper is now into the 90s and his side go past 250.
Somerset 201-3 v Yorkshire
Lewis Goldsworthy pulls Matthew Waite away with authority to get off the mark with a boundary.
It also brings up Somerset's 200.
Warwickshire 100-3 v Kent 165
Will Rhodes clips one away for a single to bring up his team's 100.
After the loss of those early wickets, this partnership with Sam Hain is starting to hurt Kent.
Middlesex v Sussex 259-2
Tom Alsop goes to his third century of the season as Sussex continue to pile on the runs at Lord's.
Their batters are having an extraordinary season - nine are averaging more than 40.
Somerset 197-3 v Yorkshire
Yorkshire needed that.
George Bartlett pulls Matthew Waite into the leg-side but is caught by Matt Revis at fine leg.
Surrey v Essex 227-8
Adam Rossington now holds the key for Essex.
The wicketkeeper is up to 73 and has found some good support from Sam Cook who's stuck around for 25 minutes.
Can Essex sneak past 250?
Warwickshire 83-3 v Kent 165
Warwickshire's batter of the season Sam Hain goes past fifty for the sixth time.
It's come in good time too, off 64 balls with nine fours.
Hain is averaging just under 85 this campaign.
Division Two latest
Ben Duckett and Haseeb Hameed have now put on the biggest second-wicket stand for Notts against Derbyshire.
Duckett has also gone past 150 with Notts on 320-1.
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Northants 218-7 v Lancashire
Lewis McManus sees off Washington Sundar's final ball and that is stumps at Wantage Road.
McManus is unbeaten on 59, the highest score of the innings, and Northants will need him to stick around in the morning after they decided to bat.
4-69 for India's Sundar on his Lancashire debut, the undoubted pick of the bowling.
Somerset 168-2 v Yorkshire
The final session of the day is under way in Taunton.
Still 34 overs to go. If you don't receive any updates after 6pm, it's because I've melted.
Gloucestershire v Hampshire 203-2
Felix Organ is content to play out a maiden to Ryan Higgins and he ends a shorter day one on 93 with Hampshire in a good position.
Gloucestershire have kept going, using eight bowlers, and they can head off for a much needed shower!
Surrey v Essex 204-8
Two in the over and five wickets for Dan Worrall!
It's another lbw, this time Shane Snater goes without scoring.
Full and straight from the Australian and plumb.