Steve Magoffin claimed a debut seven-wicket haul as Sussex inflicted a heavy CC defeat inside three days on champions Lancashire at Liverpool.
Australian Magoffin added the scalps of Ashwell Prince for 58, Glen Chapple, Kyle Hogg and Simon Kerrigan to the three wickets he took during the latter stages of day two as the hosts were bowled out for 176 in their second innings. His seven for 34 were the second best figures of his career.
Ed Joyce swept the one run needed for victory off Kerrigan's third ball of the innings to claim 22 points just after lunch.
Durham were within one wicket of defeat when play finally ended against Nottinghamshire at Chester-le-Street.
Notts added 104 to their overnight 231 for four, Michael Lumb falling for 131, to set the hosts an unlikely 368 to win.
Captain Phil Mustard made 80 but Andre Adams took four for 54 and Notts claimed the extra half-hour in a bid to force a result. But last pair Graham Onions and Mitchell Claydon ensured the players will come back tomorrow with Durham 203 for nine, still 165 runs from their target.
A century by Nick Compton and a partnership of 167 with Jos Buttler brought Somerset back into contention against Warwickshire at Edgbaston.
The pair stretched a slender lead of 35 beyond 200 and with Adam Dibble adding a career-best 43, the West Countrymen posted a total of 354 to set the home side 259 for victory.
William Porterfield's unbeaten 57 took them to 123 for two, needing a further 136 to win their opening championship fixture.
Captain Rory Hamilton-Brown's rapid fifty took Surrey within sight of victory against fellow promoted side Middlesex at Lord's.
Having resumed at 161 for five in their first innings, the visitors reached 222 before Jon Lewis took five for 41 to help blow Middlesex away for just 106 second time around, Sam Robson top-scoring with 43.
Three quick wickets went down with just 22 on the board but Hamilton-Brown took just 49 balls to reach his half-century, closing on 51 not out with his side on 95 for four and needing a further 46 to win when bad light stopped play.
Jon Clare took match figures of 11 for 57 as Derbyshire wrapped up a 130-run victory over Glamorgan inside three days.
After being left 233 to win, Glamorgan slumped to 102 all out in their second innings in just 31.3 overs.
Clare followed up his five for 17 in the first innings, when Glamorgan were dismissed for just 95, with six for 40 in the second as the hosts lost their last eight wickets for just 16 runs in 51 balls.
Youngster Matt Coles took six wickets as Kent cruised to an innings victory inside three days against Northamptonshire at Wantage Road.
The 21-year-old seamer took career-best figures of six for 51 as Northamptonshire were bowled out for 116 before lunch as the visitors won by an innings and 120 runs.
Only three batsmen made it to double figures in Northamptonshire's second innings, with captain David Sales top-scoring with 42 in an abject team display.
Gloucestershire reached 129 for five in their second innings to set up an intriguing final day against Hampshire at Southampton.
The hosts lost their last three wickets for 17 on Saturday morning, missing out on a batting point as they were bowled out for 199.
Hamza Riazuddin took three for 30 as to reduce Gloucestershire to 71 for five but Ian Cockbain and Will Gidman put on an unbroken 58 by the close to take their side 244 ahead with five wickets standing.
