Image source, Rex Features

So that's where we'll draw stumps ourselves at the end of the first day.

A few impressive innings from across those nine fixtures.

Hats off to Gary Ballance though, who will resume on 120 not out tomorrow for Yorkshire against Hampshire.

You can read how he performed as well as all the other day's reports on the counties page of the BBC Sport website.

We'll be back for day two from 10:45 BST on Friday. Thanks for being with us.

Image source, Getty Images

Division One:

Ageas Bowl: Hampshire v Yorkshire 310-3

Trent Bridge: Nottinghamshire 263 v Somerset 74-3

The Oval: Surrey 342-7 v Essex

Edgbaston: Warwickshire v Kent 367-5

Division Two:

Chester-le-Street: Durham 210-8 v Sussex

Sophia Gardens: Glamorgan 433-4 v Northamptonshire

Bristol: Gloucestershire v Derbyshire 256-7

Grace Road: Leicestershire v Worcestershire 348-4

Lord's: Middlesex 236-9 v Lancashire

We're just about done for the day - stand by for a full look at the scores at stumps...

And in the second city, Kent reach stumps on 367-5 in their first innings.

Zak Crawley's earlier century backed up by Heino Kuhn's 72 and Ollie Robinson's unbeaten 59.

Image source, Getty Images

All done for the day in Nottingham where it's been left interestingly poised.

Notts dismissed for a battling 263 and then Somerset close on 74-3 in reply. That's a bit of a recovery from 36-3 early on.

Image source, Getty Images

And that ends the first day's proceedings at The Oval where more than 2,500 came through the famous gates I'm told.

Ryan Patel finishes unbeaten on 70. Essex will feel a bit happier having picked up some late wickets.

All done for the day as Yorkshire close on 310-3.

Gary Ballance finishes unbeaten on 120 after Joe Root made 94 earlier.

It's definitely been a day for digging in at Chester-le-Street but Durham have battled their way past 200 thanks to Liam Trevaskis' half-century...

Luke Wood has had a good day with a battling 52 but goes a bit awry with the ball as Tom Abell pounces on width outside off stump for successive boundaries.

Much tighter line now. Abell defends.

Three overs left before stumps.

One last effort tonight for Graham Onions, but he drifts down leg with the second ball of his over and that's an easy four runs for Toby Roland-Jones.

Ooh! He plays down the wrong line of the fifth ball and the ball squirts away through the vacant third slip area for four.

He blocks the last. And... breathe.

50 for Ollie Robinsonpublished at 17:59 British Summer Time 11 April 2019

17:59 BST 11 April 2019

Warwks v Kent 341-5

That's a maiden first class 50 no less for the Kent Academy graduate.

81 balls and eight fours.

Aside from Lord's and Chester-le-Street, here's the latest:

Worcestershire have reached 337-4 against Leicestershire at Grace Road, where Daryl Mitchell made 114 and Hamish Rutherford is on 116 not out.

Harvey Hosein and Matthew Critchley are digging in for Derbyshire, where the visitors are 246-5 against Gloucestershire.

There are two centurions at Cardiff, where Marnus Labuschagne (121) and Billy Root (105 not out) have dominated for Glamorgan against Northants.

The hosts are 373-4.

Ryan Patel (68 not out) and Will Jacks (88 not out) take their fifth-wicket partnership past 150 now as we move into the final stages of this first day.

Jacks has played a very enjoyable knock to really hammer home the defending champions' opening day advantage.