Warwickshire have won the County Championship for the first time since 2012 after a 118-run demolition of Somerset at Edgbaston.
A thrilling third-day performance from Lancashire saw them earn what could be a Championship-clinching victory after seeing off title rivals Hampshire by one wicket.
Danny Briggs starred with bat and ball to give Warwickshire the edge in the hotly-contested County Championship title race.
Essex secured the County Championship Division Two title with an innings-and-44-run win against Northamptonshire inside two days.
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.
Liam Dawson took five wickets as Hampshire beat Nottinghamshire to seize top spot heading into the final round of fixtures.
Lancashire kept their flickering County Championship title hopes alive by completing a 10-wicket thrashing of Somerset.
Jack Blatherwick took 4-28 on his first County Championship bowl for Lancashire as they put Somerset to the sword on day two of their Division One match at Taunton.
Sir Alastair Cook hit a hundred for Essex, while Chris Woakes picked up three wickets in a bowler-dominated day in Leeds.
Hampshire pulled off an impressive victory in Division One of the County Championship in Division One, defeating Warwickshire by 60 runs in a thrilling encounter.
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.
Matthew Fisher boasted a career-best match haul of nine wickets as Yorkshire wrapped up a remarkable victory over Somerset inside two days at Scarborough.
A superb James Vince batting rearguard helped save his Hampshire side from defeat to Yorkshire in their County Championship clash.at the Ageas Bowl.
Darren Stevens smashed a quickfire ton as Kent beat Leicestershire to claim their first County Championship win of the season.
Luke Fletcher impressed with bat and ball to help put Nottinghamshire in control of their County Championship Division One game against Somerset.
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.
The fixtures for the division stage of the County Championship have been released, with Warwickshire playing Lancashire first up.
The return of the County Championship also signals the return of Sky Cricket's Benedict Bermange stats roundup on the best from this week's games...
Ravi Ashwin stepped up his preparations for India's Test series against England by taking 6-27 in Surrey's County Championship match against Somerset.