NADEEM Malik claimed his best Championship figures for Worcestershire to spark a Leicestershire collapse.
The home side lost their last six wickets for 25 runs in 20 overs as they plunged from 200-4 to 225 all out in the Division Two clash at Grace Road.
Malik took 5-71 and then Zander de Bruyn hit his first Championship half-century for the visitors who closed the day on 158-4 to trail by 67 runs.
It was a disappointing batting performance by Leicestershire who had looked comfortably placed when Dinesh Mongia and Hylton Ackerman were together in the middle, sharing a fourth wicket partnership of 49.
But Ackerman received a virtually unplayable delivery from Chaminda Vaas that struck high on the bat.
But the collapse really began with the departure of Mongia shortly before lunch. The Indian left-hander had been playing beautifully, reaching his 50 off 71 balls with nine boundaries.
But having progressed to 66, he went for one big shot too many and bottom-edged into the stumps as he tried to pull a short-pitched delivery from Malik.
From that point, the home side's innings folded as Malik and left-arm spinner Ray Price cleaned up the tail, Price taking 3-29. Only John Sadler with 22 offered any real resistance.
But Worcestershire also made a poor start with Steve Davies and Graeme Hick both falling victim to Ottis Gibson with only 27 on the board.
Stephen Moore fell for a well-made 41 and Ben Smith stroked 45 before being caught and bowled by Darren Maddy.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules hereComments are closed on this article