Colin Ackermann’s superb 186 led Leicestershire to 422-9 before declaring as their game with Sussex headed towards a draw on day three.
Beginning the day on 61 not out, Ackermann was one run short of his career-best first-class score as he hit 24 fours in a 458-minute innings.
Mark Cosgrove made 64 in a 141 third-wicket stand with the South African.
Spinner Luke Wells had figures of 4-81 for Sussex, who replied with 11-0 in the final few overs – they lead by 27.
Leicestershire batsman Colin Ackermann:
“Our target was to bat the whole day and get as close to their score as we could, and we pretty much did that.
“Sussex have some high-class bowlers, and there was a bit in the wicket, especially some variable bounce.
“There was a bit of turn too, so I had to keep applying myself.
“Cozzie (Mark Cosgrove) was brilliant in the morning, he really got the scoreboard moving, and took a lot of pressure off me.”
Sussex’s Luke Wells:
“It was nice to get a prolonged bowl today, not having bowled properly for a long time through knee injuries and so on.
“After not getting runs in the first innings it was nice to go out there and contribute, and I feel like I’m pretty much back to 100% fitness.
“It’s a rare sight to see two leg-spinners bowling in tandem, with myself and Will Beer, and I think we both enjoyed it.”
By BBC Sport
- Colin Ackermann
- All Rounder
- Current Team
- Sunfoil Series, RamSlam T20, Momentum One Day
- April 4, 1991