North Conference

Two unbeaten centuries dominated the first Roses clash of the season at Old Trafford, but it was Brad Hodge's 141 which won the day for Lancashire. Anthony McGrath's 135 led Yorkshire to a competitive total, but the bowlers were powerless against Hodge, who struck 17 fours and three sixes. Mal Loye contributed 55 and added 131 for the second wicket, then Andrew Flintoff, released by England to test his ankle, contributed 26 to a stand of 83. The victory keeps Lancashire's slim hopes of a semi-final place alive.

Graeme Swann's 3 for 31 prevented Scotland chasing down 294 to beat Nottinghamshire at Edinburgh. Charlie Shreck picked up two early wickets to leave Scotland struggling on 16 for 2, only Majid Haq (42) and Simon Smith (41*) showed any resistance as Nottinghamshire wrapped up a comfortable 77-run win. Jason Gallian was their top-scorer with 97 and there was a blistering 58 from Chris Read, which included 32 off one over from Ian Moran.

Dale Benkenstein's superb 97 took Durham to a nail-biting four-wicket win over Northamptonshire, off the last ball at Northampton. Chasing 252 Durham were in a hole at 25 for 3, but Phil Mustard (108) and his captain, Benkenstein, put on 163 for the fourth wicket. However, Mustard became Johan van der Wath's fourth victim; Garry Park was run-out for a duck and Gareth Breese was bowled for 12. But Ottis Gibson hung around in a tense final over as Durham edged over the line.

Dale Steyn's five-wickets completed an impressive all-round display from Warwickshire as they wrapped up a 59-run victory against Leicestershire at Edgbaston. He removed Tom New and HD Ackerman without a run on the board and at 35 for 5 the match was over. Half-centuries from Tim Ambrose (58) and Darren Maddy (50) laid the foundation for Warwickshire to push on to 265.

Graeme Hick and Ben Smith added 131, leading Worcestershire to a seven-wicket win over Derbyshire at New Road. From being 70 for 3, the home side cruised to their target with 11 overs to spare. Phil Weston's 78 had anchored Derbyshire's innings but from 95 for 1 they struggled to force the pace against some accurate bowling especially from Ray Price and Gareth Batty who went for 70 in their combined 20 overs.

South Conference

A brilliant opening stand of 193 between Varun Chopra (102) and Mark Pettini led Essex to an emphatic destruction of Middlesex at Chelmsford. However, the result was overshadowed when Chaminda Vaas collided with the boundary boards and was sent to hospital for tests. He was released later in the evening but will be monitored closely. Chasing a sizeable 278 the pair blazed the bowlers - Pettini particularly aggressive, bringing up his ton in 99 balls - with more then four overs remaining. Middlesex's innings was built around a slick, even 100 from Eoin Morgan and David Nash's fifty, but they hadn't reckoned on the aggression of Essex's openers.

Gloucestershire eased past Somerset by 58 runs with a fine allround display at Bristol. Kadeer Ali and Grant Hodnett put on 107 for Gloucestershire in their 259 before their bowlers removed Somerset's big three - Justin Langer, Marcus Trescothick and Cameron White - with just 31 on the board. Ian Blackwell's 71 delayed the inevitable.

Shane Warne led Hampshire to an easy six-wicket win over Sussex at The Rose Bowl, with 3 for 33 - including the wicket of Murray Goodwin. Sussex were dismissed for 201, Richard Montgomerie ninth man out for 89, and Hampshire's chase was led by Michael Lumb (66) and Sean Ervine (57*) who took them home with 11 balls to spare.

Kent made short of Glamorgan at Canterbury as Ryan McLaren and Simon Cook took four wickets each to shoot the visitors out for 85. Andrew Hall struck two early blows but it was the consistent line and length of McLaren and Hall that caused most problems. McLaren, the South African allrounder signed on a Kolpak deal, claimed the key wickets of Michael Powell with a touch a low bounce and Jimmy Maher taken at slip. Hall and Geraint Jones made short work of the target, taking just 11.4 overs as they both scored at more than a run-a-ball. Glamorgan have not won a 50-over domestic match against first-class opposition since 2001.