Duffield claimed derby honours with a 96 run win over Ambergate.
Ambergate won the toss and decided to field and paceman Josh Nicholas forced a few false shots.
Generally, the Duffield top order batsman were in control and skipper Paul Bakel scored 56, while opener Chris Sheldon hit 45 and Peter Jenkins remained unbeaten on 40.
The innings finally closed on 199, a score that could have been much greater had it not been for a steady eight over spell from Ambergate’s Dave Nightingale at the end of the innings that returned him 2 for 23 figures.
In reply, the Ambergate openers of Heath and Pratt made a solid, if unspectacular, start and had reached 35 off the first 12 overs when Pratt was bowled by a late in-swinger from Patterson.
This was the breakthrough Duffield had been searching for and Patterson in partnership with Joe Wozniczka-Wells ripped out the next four wickets for no runs with the scoreboard stuck on 37.
Only Josh Nicholas, with a swashbuckling 51 not out, offered any serious resistance and the Ambergate innings closed on 103 with Patterson taking 4 for 25 and Wozniczka-Wells 2 for 25.