That brings to a close our coverage of day one.

Some very interesting scoreboards around the country and tomorrow could bring some key moves in the title, promotion and relegation races.

Join us in the morning.

• Leicestershire 98 v Yorkshire 263-8
• Middlesex 377 v Gloucestershire
• Northamptonshire 219 v Derbyshire 65-1
• Sussex 121-1 v Glamorgan 186

• Durham v Lancashire 177-6
• Essex 262-5 v Nottinghamshire
• Kent v Hampshire 213-7
• Somerset 317 v Surrey
• Worcestershire 294-8 v Warwickshire

Instead of blocking out the day, Michael Pepper sends one into the Tom Pearce Stand with three balls to go.

But this has been Tom Westley's day.

The Essex captain is unbeaten on 108 overnight with a high-quality century.

After an indifferent top-order performance left Essex 86-4, it needed Westley and Paul Walter (72) to put on 142 and give the hosts the ascendancy.

Matty Hurst is back and across to Colin Ackermann, working the off spinner into the covers for two.

He gets one more off the fourth ball, slapped to backward point.

Two slips in for Tom Hartley, who tries to force the fifth ball down the ground on the back foot and smothers the last one with a forward block.

Slow going for Lancashire, who have just about been kept in the contest by Matty Hurst, who has put on 39 in 153 balls with Hartley and remains unbeaten on 74 not out.

The Red Rose will have to try and go up a gear tomorrow to keep the pressure on Notts, who hold a slender advantage just above them in the relegation zone.

Liam Patterson-White bellows out a couple of loud appeals for a caught behind that does carry and an lbw. He's done for the day.

Fahan Ahmed will bowl the last over of the day.

A huge day for Yorkshire's promotion hopes.

They won a crucial toss this morning and bowled first on a pitch that did all sorts with the new ball.

Leicestershire didn't help themselves at times but Yorkshire were very disciplined with the ball and Ben Coad returned figures of 10-6-15-5.

The Foxes crashed to 15-7 and were in danger of setting some unwanted records before Ben Cox got a few away and made 51 not out to avoid complete humiliation.

But they were still fired out for just 98 in only 24.2 overs.

Yorkshire wobbled themselves at 56-4 and at 142-6, their lead was only slender.

But Jonny Tattersall has played a wonderful innings to steer his side into what should now be a match-winning lead.

He walks off 90 not out, the toast of the Broad Acres.

A batting point for Essex.

Michael Pepper strolls through for a simple single and that is 250 on the board and a point.

A switch of ends from Callum Parkinson, now coming in from the Lumley End.

Tom Hartley leaves the ball, bowled from round the wicket with a bit of width outside off. Maiden over.

Colin Ackermann will bowl the last over of Day One.

A short spell for the occasional spin of Colin Ackermann, who tosses the ball up to Tom Hartley with one slip in place.

Hartley pushes a single into the leg side.

Matty Hurst tries to work the ball away off side on the back foot and then gets forward to the next one to block.

Two overs left tonight.

Derbyshire firmly on top after day one of the battle between the second tier's bottom two sides.

A collective effort from the basement team with seven bowlers taking wickets to dismiss Northants for 219, Saif Zaib's 90 the highlight for the hosts.

Derbyshire lost Harry Came early in their reply but Luis Reece (39no) and Brooke Guest (20no) got through the remainder of the evening session unscathed.

Kyle Verreynne is the only person at Chelmsford who thinks he's stumped Michael Pepper.

It was a wild sweep missed by the batter, and then the bails are dislodged.

Verreynne runs towards the square leg umpire convinced he should have a wicket.

Actually, the replay shows the South African is probably right. Hard to tell 100 per cent but Pepper's back foot was high in the air.

Tom Westley isn't done with just a century.

He sweeps Farhan Ahmed, gets enough on it to take it fine and to his eighth boundary of this crucial innings.

Six overs to go.

up for Yorkshirepublished at 18:01 British Summer Time 9 September

18:01 BST 9 September

Leics 98 v Yorks 251-8

In the context of today's cricket, this is a miracle innings from Jonny Tattersall.

He's onto 88 not out - and it's been a vital knock to ensure Yorkshire didn't waste their good work with the ball earlier.

A batting point is raised and four overs are left in the day.

Tom Price ends the day with a deserved haul of 5-81 in 21.2 overs.

Henry Brookes is last out for a second-ball duck, stuck on the crease and fencing a ball that seams away, edging to keeper James Bracey.

An absorbing contest ends with Middlesex perhaps slightly the happier of the two sides after fluent knocks from Mark Stoneman (42) and Max Holden (77), followed by a thrilling counter-attack from Jack Davies (91) and Josh de Caires (64) - who put on 120 for the sixth wicket.

Gloucestershire rarely bowled badly and will rue an edge or two which didn't quite carry to slip.

Tom Hartley is forward to Bas de Leede, defending into the off side.

Hartley sways out the way of a bouncer and defends a slightly fuller ball on the up.

A couple of plays and misses outside off in a tense over, which ends with Hartley digging out a yorker.

100 for Tom Westleypublished at 17:56 British Summer Time 9 September

17:56 BST 9 September

Essex 236-5 v Notts

Image source, Rex Features

Brought up with a FIVE!

Tom Westley dabs into the leg side and sets off. Haseeb Hameed shies at the stumps to run Michael Pepper out.

It only just misses and runs away for four overthrows.

A 28th First Class century for Westley. A top effort from the Essex skipper.

Toby Roland-Jones is moving up a gear or three here.

He flays a short ball from Zaman Akhter square for four and gets four more smashed through cover point.

And now he's out!

Akhter pitches it up and the ball flies into the stumps via the inside edge as the Middlesex captain goes for a flashing drive.

A loose shot with 400 possibly on the cards.

Henry Brookes is the Middlesex number 11.

Indeed we won't see those two overs today, as another top Sussex day ends.

Glamorgan reached 186 - largely due to Kiran Carlson's excellent 56 and Dan Douthwaite's patient 41.

At the time it looked a middling score, with the batting clearly not easy against the moving ball but Dan Hughes and Tom Haines saw out the new ball trouble.

They put on 110 before Haines edged to first slip but only trailing by 65 at close one down is a good position to build a commanding position tomorrow and beyond.