County Championship D2, Northampton (close): Northamptonshire 203 v Derbyshire 46-3
Thirteen wickets fell on the first day's play between Northamptonshire and Derbyshire.
Northants did not look in any real trouble at lunch when they were three wickets down.
But they lost their last seven wickets for 76 runs, with Nathan Dumelow taking 5-82 and Lian Wharton 4-50 in an inspired afternoon spell.
In reply, Derbyshire got off to the worst possible start when they slumped to 22-3.
Opener Andrew Gait was run out for seven and Chris Bassano was trapped lbw for one.
Bad light stopped play twice and at stumps Derbyshire were 46-3, with Mohammad Kaif unbeaten on 17.
Northamptonshire: M E K Hussey (Capt), M J Powell, P A Jaques
J W Cook, D J G Sales, G P Swann, B J Phillips, T M B Bailey (Wkt)
M S Panesar, A Nel, J F Brown.
Derbyshire: A I Gait, M J Di Venuto, C W G Bassano, M Kaif
N R C Dumelow, L D Sutton (Wkt), D G Cork (Capt), T Lungley, G Welch
K J Dean, L J Wharton.