Lancashire next up for champions Hampshire
Defending champions Hampshire face a home tie against Lancashire in the quarter-finals of the Friends Life T20.
The South Group winners, who lost just once in the pool stage, will start as favourites at the Ageas Bowl against a Lancashire side who finished runners-up in the North standings.
Durham, who were one of the best two third-placed teams, will make the trip to Northamptonshire on Tuesday in another quarter-final, while Surrey meet Somerset on the same day.
Somerset, twice finalists, beat Warwickshire on Tuesday night, to make it through to the knockout stage for the fifth consecutive year.
The other quarter-final pits North Group winners Nottinghamshire against Essex, who lost their last game against Surrey in embarrassing fashion, but who scraped through to the last eight as a result of Middlesex's defeat against Hampshire.
Tuesday, August 6: Surrey v Somerset, Northants v Durham
Wednesday, August 7: Hants v Lancs
Thursday, August 8: Nottinghamshire v Essex
Nottinghamshire 4, Hampshire 4.33, Surrey 7.5, Someset 7.5, Northants 8, Essex 10, Durham 10, Lancashire 11