Use audio icons to listen to ball-by-ball commentary of each match
Group One: Essex v Derbyshire, Durham v Worcestershire
Group Two: Middlesex v Hampshire, Somerset v Surrey
Group Three: Glamorgan v Yorkshire, Sussex v Kent
Glamorgan 149 v Yorkshire 230
And Glamorgan sweep up Yorkshire too as number 11 Ben Coad is out for a two-ball duck, leaving his captain Steven Patterson stranded on 47.
A great ninth-wicket partnership from Patterson and Joe Root has given Yorkshire a 81 run lead. When Patterson walked out to the middle, his side were 111-8.
Hampshire need 66 to beat Middlesex
Another five-fer for Kyle Abbott!
He traps Ethan Bamber in front to finish the second innings with 5-41 and claim match figures of 11-85. Some effort that. He and Mohammad Abbas shared 17 wickets in total.
Hampshire need just 66 for victory.
Root b Douthwaite 99 (Glamorgan 149 v Yorkshire 229-9)
Joe Root falls one short of his century as he inside-edges on to his own stumps.
A marvellous innings from the England captain comes to a close after 199 balls.
Glamorgan are back in this game. Yorkshire's lead is 80.
Glamorgan 149 v Yorkshire 229-8
You can follow audio commentary of Yorkshire's match with Glamorgan on BBC Radio 5 Live Sports Extra at the top of this page by the way.
Root back on strike.
Middlesex 172 & 97-9 v Hampshire 208
Mohammad Abbas and Kyle Abbott are some pairing.
This time it's Abbas' turn, trapping Blake Cullen lbw to leave Middlesex nine down - leading by just 61.
Glamorgan 149 v Yorkshire 224-8
A single. 99 not out now.
Glamorgan 149 v Yorkshire 223-8
A nice two and Joe Root is on 98. Don't let us down Joe!
Derbyshire 146 & 18-1 v Essex 412-3 dec
Good news to bring to you as play is set to return in Chelmsford at 16:55 BST.
Well good news for everyone except Derbyshire.
Middlesex 172 & 95-8 v Hampshire 208
A handy little eighth-wicket partnership between James Harris and Blake Cullen is put to an end by Kyle Abbott.
Abbott pins Harris in front to claim his 10th of the match and leave Middlesex eight down, leading by 59.
Glamorgan 149 v Yorkshire 219-8
Joe Root now moves to 96 not out. He's one hit away from a first County Championship ton of the season.
Durham 246 & 300-4 v Worcestershire 213
Forgot to tell you guys that play is back under way at Chester-le-Street. My bad guys!
Durham have been going along nicely with a lead of 333. Jack Burnham is also not out on 85.
Glamorgan 149 v Yorkshire 213-8
Root now on to 92 as the century partnership comes up. Steven Patterson is on 43 not out, also chasing a milestone.
Glamorgan 149 v Yorkshire 208-8
Joe Root is on 90 not out...
Middlesex 172 & 93-7 v Hampshire 208
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Glamorgan 149 v Yorkshire 203-8
A first batting point for Yorkshire as Joe Root hits another boundary.
Yorkshire's lead is now 54 while England captain Root is not out on 87.
Just 13 away, don't go anywhere people.
Glamorgan 149 v Yorkshire 198-8
Yorkshire are starting this session how they finished the last with the runs flowing. They're about to bring up 200 as Joe Root hits two fours to move into the 80s.
Glamorgan 149 v Yorkshire 185-8
We are playing in Cardiff again though as Joe Root (75 not out) and Steven Patterson (34 not out) walk to the middle after tea.
Big session coming up with the lead just 36.
Derbyshire 146 & 18-1 v Essex 412-3 dec
The first good thing that's happened to Derbyshire all day I reckon.
We're off for bad light.
Derbyshire 146 & 14-1 v Essex 412-3 dec
Terrible start for Derbyshire, there's already been an Essex wicket as Jamie Porter bowls Luis Reece for a seven-ball duck.
Sadly no 10-for for Simon Harmer in this innings either then. Disappointing.
Durham 246 & 271-4 v Worcestershire 213
That's tea right as Durham's lead passes 300.
We're now into potential declaring territory. The forecast for tomorrow doesn't look great. I wonder how many sessions Scott Borthwick will want his side to bowl at Worcestershire.