Seven games - four in Division One and three in Division Two
Sam Curran hits 126 as Division One leaders Surrey declare on 673-7 at home to Kent
Essex's Simon Harmer takes 8-46 & Hampshire's Liam Dawson 7-68 as spinners dominate at Chelmsford
Gloucestershire all out for 337 against Lancashire, Northants post 451 against Warks
Top two in Division Two meet as leaders Nottinghamshire declare on 551 at home to Middlesex
Madsen 176 puts Derbyshire in charge against Sussex, Glamorgan struggling at Worcs
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Surrey 490-5 v Kent
Little to report at The Oval thus far where the run-scoring machine that is Surrey CCC continues to chug along.
Sam Curran is up to 68 in his quest to become Surrey's third centurion of their innings, Will Jacks providing support on 28no.
Surrey have hit 69 boundaries - 65 fours and four sixes - as they march towards 500.
Gloucestershire 287-8 v Lancashire
First strike of the day for Lancashire at Nevil Road.
Chris Dent had added just one to his overnight score before getting trapped in front by Tom Bailey a third wicket for the Red Rose paceman.
Matt Taylor is the new man in, intent on helling Zafar Gohar claim a third batting point for the hosts.
Lancashire have another 17 overs to claim the one more wicket needed for maximum bowling points.
Good news at Northampton... not so much at Nottingham.
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Derbyshire 353-6 v Sussex
Image source, Getty ImagesTarget set by Wayne Madsen - the biggest score of this round of the County Championship thus far. Can anyone beat it?
A fantastic 176 from the in-form Derbyshire batter who is averaging 85.60 in Division Two this season. He's not even Derbyshire's top batter - Shan Masood's averaging 86.41. Ridiculous numbers.
Madsen finally departs just 11 minutes shy of six hours at the crease, caught at slip after 19 fours and one six in 263 deliveries.
Gloucestershire 286-7 v Lancashire
Steady start to the day for Gloucestershire at Bristol.
It seems a bit more bowler-friendly.
Just six singles by Chris Dent and Zafar Gohar scored from the first six overs of the day.
Essex 238 v Hampshire 105-7
Revenge was swift.
A bit like on Sunday when Nick Gubbins hit a couple of boundaries off Simon Harmer and then got out, Keith Barker falls in similar fashion.
Clean bowled - and the first batting point looks quite a way away for the visitors.
Essex 238 v Hampshire 105-6
We said Hampshire were not messing about this morning and Keith Barker has gone after Simon Harmer a couple of times, including this one.
Bosh.
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Derbyshire 353-5 v Sussex
Anuj Dal is providing fine support to Wayne Madsen for Derbyshire in Division Two at Hove.
He has his 50 and the pair have just reached their 150 partnership, with Madsen unbeaten on a magnificent 176.
Sussex have taken one wicket in the past 80 overs.
Image source, Getty ImagesEssex 238 v Hampshire 88-6
Hampshire's slump on Sunday owed much to quite a bit of defensive, indecisive batting.
They have begun Monday in a different mood, with Sam Cook's opening over going for 13.
Simon Harmer was shown a bit more respect, unsurprisingly after his match-turning spell yesterday, but Keith Barker reverse-swept him for a boundary too - Hampshire up to 88-6 from an overnight 68-6.
Barker did survive a shout for a catch off Harmer but it looked pad not bat.
We are under way in four of our games - Essex v Hampshire, Gloucestershire v Lancashire, Surrey v Kent and, in Division Two, Sussex v Derbyshire.
Worcestershire v Glamorgan will begin at 11.30 BST after a pitch inspection - while we are as yet unsure when Northamptonshire v Warwickshire and Nottinghamshire v Middlesex will start.
A quick reminder that EVERY BALL of EVERY GAME can be heard here on the BBC Sport website and app.
The individual commentary links are all easy to spot at the top of the page.
Radio Five's Kevin Howells will be fronting the on-air coverage from Trent Bridge for the Division Two top of the table clash between Nottinghamshire and Middlesex.
It was mostly a batting day in Division Two on Sunday.
Haseeb Hameed hit a ton as Nottinghamshire piled up 378-4 in the meeting of the top two with Middlesex - and there could be two more Notts centurions this morning, with Lyndon James (90) and skipper Steven Mullaney (79) both looking well set overnight.
It was a similar tale at Hove, where Derbyshire made 339-5 against Sussex, largely thanks to Wayne Madsen hitting 171 not out, his highest score in three years. He needs a further 60 today to match his career-best.
Although 13 wickets fell in the day at Worcester, the star turn was Ed Barnard. The reported Warwickshire target , externalmade a superb 131 out of the Pears' 271, as the hosts rescued themselves from 63-5 against Glamorgan. The hosts then gained further control in the contest when Joe Leach ripped out three visiting batters inside his first two overs to leave Glammy rocking at the close on 32-3.
Image source, Huw Evans Picture AgencySunday was certainly a good day for Division One leaders Surrey.
They raced to 445-5 on a flat Oval track against a lacklustre Kent attack as veteran Hashim Amla, 39, and youngster Ben Geddes, 20, both struck 124 in a double-century partnership.
Not only that, their nearest title rivals Hampshire threw away a cracking start at Essex - from the brink of disaster at 56-5, they allowed the hosts to recover to 238 as Shane Snater hit 71. Things got worse for Hampshire, undone by Simon Harmer's spin as they slumped to 68-6 in reply.
Third-placed Lancashire toiled for long spells before getting rewards late in the day at Bristol against Gloucestershire, for whom Chris Dent remains unbeaten on 109 in the hosts' 279-7.
It was also a day for the batters at Wantage Road as Rob Keogh's 130 put Northants in the box seat against Warwickshire, the hosts amassing 420-6.
Image source, Getty ImagesIn the meantime, just about time to fit in a couple of quick recaps of yesterday's action...
We will definitely be beginning on time in Bristol, Hove, Chelmsford and at The Oval.
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So it's wet this morning in Nottingham, Northamptonshire and Worcestershire. We'll keep you abreast of any potential delays to the start of play.
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We escaped with very few rain delays on Sunday - with only the games in Bristol and Worcester suffering any weather-related interruptions. And even they were fairly minimal.
But things could be a lot more stop-start on Monday with showers sweeping across the country during the day.
It's pouring down in our Birmingham HQ as we write this but hopefully the worst of the weather will be out of the way this morning, as per the forecast below.
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Division One
Chelmsford: Essex 238 v Hampshire 68-6
Bristol: Gloucestershire 279-7 v Lancashire
Wantage Road: Northamptonshire 420-6 v Warwickshire
The Oval: Surrey 445-5 v Kent
Division Two
Trent Bridge: Nottinghamshire 378-4 v Middlesex
Hove: Derbyshire 339-5 v Sussex
New Road: Worcestershire 271, Glamorgan 32-3
Image source, Getty ImagesWelcome back to day two of the BBC's online county cricket coverage.
There might be a slight distraction for cricket lovers up in Leeds during this morning's session as England's finest attempt to wrap up a 3-0 Test series win over New Zealand.
And it is also the first day of Wimbledon. But here is where we talk about a different game, where we set ourselves the challenge to match the contributions of our local radio commentary teams who describe all the action as it happens, ball-by-ball.
Here is where we talk about the real stuff, English county cricket, where our 18 first-class counties try to uncover the Test cricketers of tomorrow, at the same time as allowing a few stars of the past to grow old gracefully.
Aside from the likes of Hashim Amla, a centurion yesterday, and Sir Alastair Cook, there are only 14 of the 18 counties in action this week, but that did not mean any lessening of quality on the opening day.
There were runs, wickets and moments to treasure everywhere. Stay with us to see what today will bring.
Image source, Rex FeaturesSkipper Steven Mullaney & Lyndon James are both out to complete centuries when they resume for Division Two leaders Notts against Middlesex at Trent Bridge this morning