|LV= County Championship Division Two, Derby|
|Close, day one: Derbyshire 323-8 v Worcestershire|
|Derbyshire 3 pts, Worcestershire 2 pts|
Worcestershire paceman Charlie Morris took four wickets as the Division Two leaders fought back at Derby.
The hosts looked in command at 153-1, but Morris ripped through the middle order with career-best figures of 4-43 as Derbyshire collapsed to 283-8.
Earlier, Billy Godleman (55) and captain Wayne Madsen (56) added 112 before both fell to 22-year-old Morris.
Alex Hughes (73 not out) and Tony Palladino (18 not out) added some late runs as Derbyshire closed on 323-8.
Despite Worcestershire's bowlers taking seven wickets for just 130 in the afternoon and evening sessions, the late burst from Hughes and Palladino saw 40 runs added off just 5.4 overs.
Worcestershire, who have a 25-point lead over second-placed Hampshire and a 33-point lead over Surrey with a game in hand, need one more win from their final three games to guarantee promotion to Division One.
Worcestershire pace bowler Charlie Morris:
"We bowled well at times, certainly in the second session and at the start of the third we bowled really well and pegged it back but it's not been quite consistent enough.
"It's a good cricket wicket, there are certainly runs in there but if you bowl enough balls in the right area you've got a chance."
Derbyshire batsman Alex Hughes:
"I think the work the openers did and Madders did this morning really set us up to get a score which I think is a good one on that pitch.
"It's very dry so we think it's going to take a bit of spin as we go into the game and deteriorate a bit more and if you bowl well on it, it's tough."