Derbyshire 54 for 0 trail Leicestershire 329 (Chappell 96, Footitt 7-71) by 275 runs
Leicestershire's teenage allrounder Zak Chappell wrote his name in the county's record books despite falling four runs short of a century on his first-class debut against Derbyshire at Derby.
The 19-year-old from Grantham scored 96 from 122 balls, the highest-ever innings by a Leicestershire No. 10, before Mark Footitt yorked him to complete career-best figures of 7 for 71.
But Chappell's outstanding innings led a recovery that took Leicestershire from 131 for 7 to 329 all out with the last two wickets adding 175.
Derbyshire had 10 overs to negotiate but Billy Godleman and Ben Slater survived to the close on 54 for 0, 275 runs behind.
Until Chappell walked out in the late-afternoon sunshine to join Taylor, the day had belonged to Footitt who again bowled with the pace and swing that earned him a place in the England squad this summer.
Derbyshire's decision to put the visitors in looked questionable until he took 4 for 2 in 22 balls, including Dan Redfern who lost his off stump first ball on his return to the club he left two years ago.
Ned Eckersley scored his first championship fifty since May 12 but then clipped Footitt to square leg and when the fast bowler claimed his 250th wicket in the competition by having Ben Raine caught behind, Leicestershire were in danger of being bowled out for under 150.
But by tea, Chappell and Taylor had secured a batting point and although Taylor drove Wes Durston to short extra cover, it would be another 24 overs before Derbyshire took the last wicket.
Chappell, dropped at deep mid-off on 33, completed his fifty from 85 balls and then swung Durston over wide long-on for six as Derbyshire's frustration mounted.
When Chappell was missed for a second time on 90 at deep mid-wicket, he looked destined to score a century but Footitt struck immediately with the second new ball to deny him.
Chappell opened the bowling with Raine but could not add wickets to his runs as Godleman drove him through the covers for the boundary that took him to 1,000 championship runs in a season for the first time in his career.