The Cricketer provides all the information you need ahead of the next round of matches as the red-ball format head to the likes of Cheltenham College
Where: Chelmsford
When: Monday, 27 May-Thursday, 30 May
Lowdown: The hosts recorded their first win of the season against Nottinghamshire, while Kent will want to avoid having to repeat their stubborn final day performance against Surrey.
One to watch: Simon Harmer. Took 6-60 against Notts to record his ninth haul of five wickets or more since 2017, more than any other County Championship bowler in that period.
Weather: Cloudy for much of the match with rain intefering later on, temperatures in the high teens.
Tickets: £13 adults, Under-18 £5 - click here for more details.
Prediction: Essex
Where: Headingley
When: Monday, 27 May-Thursday, 30 May
Lowdown: Third plays second as undefeated Yorkshire host Hampshire who hold a 20-point lead over their opponents heading into this one.
One to watch: Ajinkya Rahane. The Indian batsman hit a century on debut and steadied the ship with Sam Northeast after a rocky beginning for Hampshire against Nottinghamshire.
Weather: Cloudy with sunny intervals for much of the match but threat of rain later on, temperatures in the lower teens.
Tickets: £18 adults, Under-18 £5 - click here for more details.
Prediction: Yorkshire
Where: Edgbaston Cricket Ground
When: Monday, 27 May-Thursday, 30 May
Lowdown: Both sides are winless, but Surrey will look to put their Kent frustrations behind them while Warwickshire remain at the foot of the table.
One to watch: Scott Borthwick. The batsman chipped in with a half-century in each innings and shared a huge partnership with Will Jacks.
Weather: Dry and cloudy for most of the match, with some sunny intervals. Rain expected later on, temperatures in the low teens.
Tickets: £15 adults, Under-16 free - click here for more details.
Prediction: Surrey
Where: Cheltenham College
When: Monday, 27 May-Thursday, 30 May
Lowdown: Top of the table Lancashire face promotion chasers Gloucestershire, with both sides undefeated so far this season.
One to watch: James Anderson. The England seamer took his 46th first-class haul of five wickets or more against Worcestershire in the previous round.
Weather: Mostly cloudy, with intermittent sunny and rainy spells, temperatures of around 15 degrees Celsius.
Tickets: £15 adults, Under-18 £3 - click here for more details.
Prediction: Lancashire to continue their 100% record.
Where: Grace Road
When: Monday, 27 May-Thursday, 30 May
Lowdown: Both sides have identical records and are on the same number of points as eighth plays seventh.
One to watch: Mohammad Abbas. Looked world class as he took five wickets in the match, including the dismissal of Sam Robson off the first ball of the match.
Weather: Mostly cloudy, with intermittent sunny spells and rain arriving late on in the match. Temperatures in the mid teens.
Tickets: £12 adults, Under-16 £2 - click here for more details.
Prediction: Leicestershire. Just.
Where: Hove
When: Monday, 27 May-Thursday, 30 May
Lowdown: Sussex were close to entering the promotion race in the last round while Glamorgan will look to continue their unbeaten run.
One to watch: Tom Cullen. The wicketkeeper was Glamorgan's hero as his career-best 51 not out secured victory for Glamorgan against Derbyshire last time out.
Weather: Mostly cloudy throughout the match, although sunny spells and rain are possible earlier on. Temperature highs of 16 degrees Celsius.
Tickets: £17 adults, Under-16 £1 - click here for more details.
Prediction: Sussex to end Glamorgan's unbeaten run.
Where: New Road
When: Monday, 27 May-Thursday, 30 May
Lowdown: Second plays second bottom but it was Worcestershire who suffered defeat in the last round to Lancashire while Middlesex drew with Leicestershire.
One to watch: Charlie Morris. Took four wickets in the first innings against Lancashire but may need to take another step up with Wayne Parnell's possible absence.
Weather: Mostly cloudy with intermittent showers possible, temperatures in the mid teens.
Tickets: £16 adults, Under-18 free - click here for more details.
Prediction: Worcestershire.