Watch the highlights from Day One as Sam Conners claimed four of the nine Warwickshire wickets to fall.
The 22-year-old got the hosts off to a good start with the wickets of Will Rhodes (8) and Pieter Malan (0), before dismissing Rob Yates (37) and Matt Lamb (7) after lunch.
Luis Reece (2-25), Alex Hughes (1-9), Michael Cohen (1-43) and Ben Aitchison (1-56) all struck to reduce the visitors 272-9 before the close of play.
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