An unbeaten double century from Chris Rogers helped Middlesex battle out a draw on the final day with Somerset.
Chris Rushworth came agonisingly close to claiming 10 wickets in an innings as Durham crushed poor Northamptonshire.
Middlesex were reduced to 64-7 in reply to Somerset's first-innings 523-9 declared on day two at Taunton.
Craig Kieswetter marked his return to action by digging Somerset out of a hole on day one against Middlesex.
South Africa batsman Alviro Petersen has left Somerset as he continues to struggle with a knee injury.
Adil Rashid took 5-117 as Yorkshire completed a vital innings and 18-run victory over Lancashire at Old Trafford.
Yorkshire moved into a commanding lead against Lancashire as Paul Collingwood and Durham defied Nottinghamshire.
Tom Abell, Jack Leach, Craig Meschede and Johann Myburgh have signed new contracts with Somerset.
Surrey have signed all-rounder James Burke from Somerset on a two-year deal.
Yorkshire bowled Lancashire out for 278 in the Roses clash, while Nottinghamshire were left in trouble against Durham.
Somerset have announced that director of cricket Dave Nosworthy will be leaving the county at the end of the season.
Nottinghamshire's last-ball win earned them top spot in Group B and a home quarter-final in the Royal London Cup.
Vote for your favourite catch in the NatWest T20 Blast so far from our spectacular short-list of five.
Yorkshire beat Sussex by nine wickets at Scarborough to move six points clear at the top of the LV= County Championship.
Kane Williamson converted his maiden century for Yorkshire into a fine 189 to put the home side on top against Sussex.
Paul Horton's 114 and Ashwell Prince's unbeaten half-century helped Lancashire make a spirited response to Durham's 340.
Somerset batsman Chris Jones is retiring from first-class cricket at the end of the season.
Ben Stokes cracked 103 to lead Durham to a crushing six-wicket victory over Notts in Group B of the Royal London Cup.
Sussex defeated Somerset in the only one of six Royal London One-Day Cup fixtures to beat the bad weather on Sunday.
Peter Trego hit a second straight Royal London One-Day Cup hundred to help Somerset to a six-wicket win over Middlesex.
Sussex claimed an unlikely three-wicket victory over Durham, while a thriller between Surrey and Kent ended in a tie.
Kent scraped a two-run Duckworth-Lewis victory in a thrilling Royal London One-Day Cup clash with Somerset at Taunton.
Nottinghamshire and Somerset remain unbeaten in Group B of the Royal London One-Day Cup after a tie at Trent Bridge.
Somerset enjoyed a winning start to their campaign in Group B of the Royal London Cup, while Glamorgan saw off Surrey.
Glamorgan secured the last quarter-final spot in the South Group, while Sussex's Luke Wright made a record 153 not out.