Strong batting performances put the result of these County Championship Division One matches in the balance.
Somerset v Warwickshire
Close of play: Somerset 358-6.
South African batsman Alviro Peterson continued his superb form for Somerset as he scored another century against Warwickshire.
It is back-to-back 100s for Peterson now and his knock helped the home side take control at Taunton.
Openers Nick Compton and Marcus Trescothick both scored half-centuries for the hosts, but their twin dismissals before lunch gave the away side hope on day one.
Once the Bears had Somerset on 143-4 things were looking bright for the bowling side, before Peterson and Jos Buttler put on 193 runs for the fifth wicket.
Chris Wright eventually had the South African caught behind on 136 for one of his two wickets, but the damage had already been done.
Buttler will resume in the middle today with Craig Overton.
Derbyshire v Nottinghamshire
Close of play: Derbyshire 256, Nottinghamshire 325-5.
Notts made life in Division One very tough for new boys Derbyshire after streaking past their first innings total and looking to establish a firm lead.
After being named in the Ashes squad this week, opener Ed Cowan and his partner Alex Hales both hit half-centuries but then fell in quick succession.
Michael Lumb continued the good form scoring 44 runs before James Taylor and Samit Patel looked to be taking the away side to stumps with only three wickets down.
Then misfortune struck Patel as he was run out after slipping when going between the wicket and then Riki Wessels was dismissed shortly after to give the hosts a glimmer of hope.
Taylor is still at the crease however on 67 not-out and looking sharp and will have wicket-keeper Chris Read for company when day three resumes.