Yorkshire are the new leaders of the LV= County Championship after completing victory over Derbyshire, while Middlesex and Essex look well placed for wins going into the final days of their matches at Hove and Chelmsford.
There was a win for Warwickshire at Edgbaston as they kept their LV= County Championship title defence alive. Meanwhile rivals Yorkshire and Middlesex took complete control of their matches against Sussex and Derbyshire.
There were wins for Durham, Leicestershire, Warwickshire, Glamorgan and Middlesex in the evening's Friends Life t20 matches. Meanwhile, at Cheltenham, Kent and Gloucestershire set up a last day run chase in their LV= County Championship Division Two match.
The LV= County Championship made a return as the Friends Life t20 takes a break before its return in earnest at the weekend. There were good performances today from Mark Footitt, Michael Yardy, Varun Chopra and James Vince
Durham and England all-rounder Paul Collingwood has ended speculation about his future in county cricket by signing a three-year deal with the Dynamos.
There had been speculation that he was to consider a move to Derbyshire but he has decided to remain with his home county, for whom he has played since 1995.
Durham have handed all-rounder Ian Blackwell a new two-year contract that will keep him at the club until the end of the 2013 season.
Blackwell moved to Durham from Somerset in 2009, making an immediate impression as he picked up the 2009 Player Of The year and 2010 Bowler Of The Year award.
Durham welcome back captain and wicket-keeper Phil Mustard and fast bowler Graham Onions for their LV= County Championship fixture with table-topping Warwickshire.
Mustard missed the previous matches against Yorkshire and Sussex with a toe injury, Michael Richardson deputising behind the stumps and head coach Geoff Cook has named a 13-man squad for Warwickshire's visit.
Ruel Brathwaite and Mitchell Claydon are in contention for a start as Durham take on Sussex in their first home LV= County Championship match of the summer.
The pair come into the squad due to a quadracep muscle injury to Liam Plunkett and the decision to rest Graham Onions as he continues his recovery from a back operation.
Durham have welcomed Graham Onions back into their matchday squad ahead of the LV= County Championship game against Yorkshire at Headingley Carnegie.
Onions is back in contention for a first-team place after undergoing surgery on a back injury that ruled him out of all cricket since May.
Durham welcome back fit-again captain Phil Mustard for their season-opening LV= County Championship match against Hampshire at The Rose Bowl.
Mustard returns following a foot injury and a strong bowling attack while be led by Steve Harmison and having shown good form in pre-season, leg-spinner Scott Borthwick earns a starting place.
The lure of new world champions India coming to England has resulted in the One-Day International at the Emirates Durham International Cricket Ground being sold out.
Over 17,000 fans have bought tickets to see whether India can live up to huge expectations in the first of five One-Day Internationals between the two sides.
Durham have signed South African international David Miller to boost their squad for the Friends Provident t20 competition later this year.
Miller, 21, made his international debut in 2010, and currently averages 41 in Twenty20 International cricket from six matches while has also played 13 One-Day Internationals.