The ECB has confirmed the fixtures for the 2022 county domestic competitions, with an increase in County Championship matches played over June and July.
Jahid Ahmed has become the latest former Essex player to allege he was the subject of racist abuse while playing for the club.
The England and Wales Cricket Board has said it is "appalled" by fresh racism claims made by former Essex player Maurice Chambers.
Former Essex cricketer Zoheb Sharif has alleged he suffered racist abuse during his time playing for the club.
Essex chairman John Faragher has resigned with immediate effect following a historical allegation he used racist language at a board meeting in 2017.
Hampshire's bid to secure a first County Championship title since 1973 got off to a poor start as they were bowled out for 143 by rivals Lancashire.
Warwickshire completed a 106-run win over Yorkshire to maintain their LV= Insurance County Championship title hopes.
Sir Alastair Cook hit a hundred for Essex, while Chris Woakes picked up three wickets in a bowler-dominated day in Leeds.
Sam Robson hit the second-highest score of the County Championship season as Middlesex piled on the runs on the second day against Sussex in Division Three.
Chris Benjamin made a hundred on his Championship debut and Sam Hain hit his first red-ball ton for over two years as Warwickshire dominated day one at Lancashire.