Jofra Archer (Sussex)
Dom Bess (Yorkshire)
Rory Burns (Surrey)
Zak Crawley (Kent)
Ben Foakes (Surrey)
Dan Lawrence (Essex)
Ollie Pope (Surrey)
Joe Root (Yorkshire)
Reece Topley (Surrey)
Mark Wood (Durham)
How to watch and listen
All nine matches are available to live stream through the ECB Match Centre and England Cricket app.
Full match commentary is available through local BBC Radio stations.
England player highlights
Olly Stone's battle with Sir Alastair Cook was one for the ages, with the former England captain even recording a rare six as he hooked the Warwickshire pacer over square leg.
Surrey's Ollie Pope continued his fine summer with another century at The Kia Oval.
Another terrific 💯 for Ollie Pope!— LV= Insurance County Championship (@CountyChamp) May 5, 2021
He has a first-class average of 105.61 at the Kia Oval - no Englishman can better that in the history of the game (min 10 innings)#LVCountyChamp pic.twitter.com/RSHoIpxQ23
Matt Parkinson's ball to dismiss Northamptonshire's Adam Rossington was compared to Shane Warne's 'Ball of the Century' that dismissed Mike Gatting back in 1993.