England paceman Olly Stone took four wickets as Warwickshire had the better of the first day of the opening Bob Willis Trophy match against Northamptonshire at Edgbaston.

Northamptonshire, put in, were bowled out for 142 with Stone taking four for 39 against his former team-mates to send out a strong message to England’s selectors that he is fit and firing.

The visitors then hit back impressively in the final session as Warwickshire dipped to 85 for four but 20-year-old opener Rob Yates (63 not out, 130 balls, nine fours) stayed solid to take his side to 130 for four at the close.