Daniel Bell-Drummond struck an unbeaten 79 to steer Kent to a first County Championship win over Lancashire at Old Trafford in 27 years.
Joe Root scored his second Vitality County Championship century in as many innings with a sublime 156 for Yorkshire against Glamorgan at Headingley.
Twenty wickets fell on day one of the Vitality County Championship match at Taunton with Essex rolling Somerset for 128 after they had been bundled out for 156.
Champions Surrey needed only 30.2 overs to wrap up victory by an innings and 11 runs against Hampshire in their Vitality County Championship clash at the Kia Oval.
Harry Brook scored his second Vitality County Championship century of the season and Joe Root his first, while Ben Duckett made 218.
Ben Duckett scored an unbeaten 197 to hold Nottinghamshire's batting together on day one against Warwickshire at Edgbaston.
Essex claimed their second win of the County Championship season with an innings and 124-run win over Lancashire.
Joe Root, Harry Brook and Zak Crawley were all out cheaply as the County Championship returned for round three with the Dukes ball instead of the Kookaburra.
England's Joe Root could only find two runs on his Yorkshire return as captain Shan Masood's 26th first-class century rescued his side against Gloucestershire.
Harry Brook smashed a 69-ball hundred for Yorkshire in the County Championship in his first competitive innings since December.
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Yorkshire have confirmed the controversial return of Colin Graves to the board of the club.
Colin Graves has called for a "line in the sand" to be drawn on Yorkshire's turbulent recent history after members voted in favour of his return as chairman on Friday.
Colin Graves has apologised "personally and unreservedly" to those who experienced racism at Yorkshire as his return as chairman moves closer.
Azeem Rafiq says Colin Graves' expected Yorkshire return shows cricket is "not safe" for minority ethnic cricketers and that the club "means nothing to me anymore".
Yorkshire's board has agreed to a proposal from a consortium led by Colin Graves which is set to see the former chairman make a controversial return to the club.
Colin Graves' potential return as Yorkshire chair would "undermine progress made" to tackle racism in cricket, Sporting Equals has said.