Northamptonshire are unbeaten after five matches. They have chased 209 comfortably and defended 145 by seven runs, and their bowlers have taken 84% of the wickets in the tournament so far. Chris Lynn has 207 runs in four innings at a strike rate of 170.5, and Ricardo Vasconcelos has 116 runs in five games. In the middle order David Willey, Justin Broad and Saif Zaib have kept the tempo high, with Willey striking at 159.
James Sales leads the attack with 13 wickets, while Ben Sanderson and Calvin Harrison have seven each and Willey five. Harrison took four wickets against Worcestershire earlier in the season, and Willey made 46 off 23 in that meeting.
Worcestershire come off a narrow three-run loss to Gloucestershire, having limited them to 148 before slipping to 4 for 28 in the chase. Sikandar Raza (47) and Gareth Roderick (23) fought back without quite getting there. Kashif Ali has 112 runs at 132.5, and Adam Hose has 108 at a strike rate of 142. Adam Finch has 10 wickets and Usama Mir eight, but the visitors face a very strong home side.