A career-best haul from left-arm seamer Mark Footitt ensured Derbyshire enjoyed a productive opening day of their LV= County Championship clash against Durham at the Emirates Durham ICG.
Footitt finished with figures of 6-53, which included three wickets in five deliveries in the second over with the new ball, as Durham collapsed from 222 for four to 253 all out.
Keaton Jennings struck a championship-best 93 to help Durham's cause, while the hosts were further boosted when Chris Rushworth trapped Chesney Hughes in front as Derbyshire closed on 15 for one.
It could have been better for Durham as Richard Johnson, promoted to open, had a narrow escape when a fine ball from Rushworth passed just over his stumps.
As Durham are hoping that they might be able to draft in Graham Onions on Wednesday, if he is not required by England, it was surprising that Derbyshire put them into bat.
Although Footitt swung the ball in the early haze and persuaded acting captain Mark Stoneman to chip to mid-on in the third over, the decision was hardly vindicated by a lunchtime score of 97 for two.
Scott Borthwick took 10 runs off the sixth over, bowled by Tim Groenewald, but fell lbw to a Footitt yorker for 22.
Groenewald bowled a good spell in the afternoon to have Will Smith taken at second slip for 43 and Michael Richardson caught behind.
Left-hander Jennings was on 46 at lunch and added only 36 in the afternoon session as he passed his previous championship best of 70, made against Lancashire last September.
After reaching 90 with a four driven through extra cover he became nervous and was half forward when he fell lbw against the off spin of Wes Durston.
Jennings faced 222 balls and put on 90 for the fifth wicket with Phil Mustard, who made 52 after being promoted to number six because Ben Stokes was feeling unwell.
Stokes went in at the fall of Jennings' wicket but lasted only five balls before driving Durston to mid-off.
Mustard and Gareth Breese quickly put on 18 before Footitt accounted for both as extra bounce produced catches at third slip for Jonathan Clare.
Mustard appeared very comfortable, registering two reverse-swept fours among his eight boundaries in a 105-ball half-century.
But he was undone by an excellent Footitt delivery, before in-swing from Derbyshire’s star man defeated Callum Thorp - who was lbw first ball - and Rushworth.