Surrey 557 (Pietersen 355, Raine 4-124) and 218-3 (Davies 115*, Roy 67) beat Leicestershire 292 (Lewis 126, Raine 57, Dunn 4-72) and 480 (Eckersley 118, O'Brien 78, Robson 55, Ansari 6-152) by seven wickets at the Oval
Gloucestershire 388 (Dent 116, Marshall 58, Tavare 53, Jarvis 4-121) and 275 for 9 dec (Marshall 92, Handscomb 76, Siddle 4-39) beat Lancashire 364 (Horton 168, Norwell 4-95) and 208 (Petersen 63, Davies 58, Miles 4-58) by 91 runs at Old Trafford
Northamptonshire 324 (Willey 103, Cobb 95) and 390 for 9 (Keogh 163*, Footitt 4-94) drew with Derbyshire 343 (Critchley 137, Azharullah 5-59) and 407 for 5 dec (Hughes 104, Slater 94) at Derby
Glamorgan 281 (Bragg 104) and 309 for 9 (Cosker 69, Ingram 51, Wagg 51, Haggett 4-61) drew with Kent 357 (Bell-Drummond 123, Stevens 50, Hogan 5-71) and 327 (Denly 66, Cowdrey 54, Tredwell 53, Hogan 4-65) at Canterbury
Yorkshire 370 (Bairstow 102, Leaning 82, Lyth 53, Tomlinson 4-86) and 305 for 4 dec (Pujara 133*, Bairstow 59) beat Hampshire 227 (Carberry 97, Brooks 4-57, Rashid 4-70) and 143 (Smith 64*, Rashid 4-48) by 305 runs at Headingley
Surrey have signed Pakistan fast bowler Wahab Riaz for the first two games of their T20 Blast campaign. The 29-year-old left-armer will be eligible to play against Glamorgan on Friday and Essex on Saturday.
Surrey have signed Nottinghamshire seam bowler Luke Fletcher on a three-match loan deal. The 26-year-old will be available to play in Surrey's County Championship matches against Northants, Kent and Glamorgan in the next four weeks. Fletcher will still be able to play for Notts in the T20 Blast
Middlesex have signed New Zealand's left arm paceman Mitchell McClenaghan, as an overseas replacement for Kyle Abbott in this season's NatWest T20 Blast campaign after Abbott's spell with the club expires at the end of June.
Somerset 312 (Allenby 64, Overton 4-56) and 161 (Philander 3-47) beat Nottinghamshire 226 (Patel 56, Overton 4-40) and 114 (Groenewald 4-41) by 133 runs at Trent Bridge
Warwickshire 450 (Barker 102*, Westwood 88, Patel 58, Onions 5-85 ) and 63 for 2 beat Durham 185 (Collingwood 68, Jones 4-48, Barker 4-54) and 327 (Stoneman 111, Barker 5-103) by wickets at Edgbaston
Lancashire 368 and 203-5 dec beat Leicestershire 249 (Cosgrove 79, Jarvis 5-69) and 78 (Bailey 5-12) by 244 runs at Grace Road
Tymal Mills could be forced to retire from first-class cricket after being diagnosed with a congenital back condition. Mills, who is thought to be the fastest bowler in English cricket, moved to Sussex from Essex over the winter and has been thought of as an England bowler of the near future. But, after breaking down in the early weeks of the season, he has been diagnosed as having a narrow spinal cord, which he has been warned could, in a worst case scenario, eventually cause substantial mobility problems if he continues to bowl.
Kent 235 (Coles 66, Norwell 4-44) and 243 for 2 (Denly 117*, Northeast 88*) beat Gloucestershire 193 (Handscomb 69, Coles 3-49) and 282 (Marshall 83, Thomas 4-53) by eight wickets in Bristol
Surrey 499 for 6 dec. (Roy 140, Sangakkara 111) drew with Northamptonshire 309 (Newton 95, Peters 82, Curran 4-89)
Glamorgan 314 (Rudolph 82, Meschede 68) and 270 (Wallace 79) beat Essex 221 (Wagg 5-54) and 274 (ten Doeschate 74*) by 89 runs in Cardiff
Worcestershire have confirmed spinner Saeed Ajmal will return to New Road next month after receiving clearance from the Pakistan Cricket Board. After obtaining a No Objection Certificate, Worcestershire expect to see Ajmal on 2 June, with a view to him playing in the T20 Blast game against Northants three days later
Sussex 191 (Wells 92, Patel 4-24) and 190 for 9 (Jordan 56*, Brown 53) beat Warwickshire 180 (Robinson 6-33) and 200 (Hobden 4-48) by one wicket at Hove
Surrey 292 (Stevens 4-58, Coles 4-81) and 196 for 7 (Roy 60*, Stevens 3-29) beat Kent 282 (Key 89, Northeast 73) and 204 (Denly 66, Ansari 4-58, Batty 3-40) by three wickets at Beckenham
Lancashire 551 (Prince 230, Petersen 113, Lilley 63, Taylor 4-113) beat Derbyshire 370 (Godleman 75, Slater 69, Amla 69, Jarvis 4-132) and 166 (Slater 58, Lilley 5-23, Kerrigan 4-80) by an innings and 15 runs at Southport
Somerset 485 (Cooper 99, Hildreth 82, Abell 62, Trescothick 56, J Overton 50, Patterson 5-70) and 6 for 1 drew with Yorkshire 438 (Leaning 123, Bresnan 100*, Bairstow 50, Trego 4-73) and 419 (Rashid 99, Bairstow 66, Leaning 52) at Taunton