Ackerman shines as decision backfires.
HD Ackerman was in sight of his fourth LV County Championship century of the season as Glamorgan's decision to put Leicestershire into bat backfired on them at Grace Road.
After a delayed start to the Division Two clash, Glamorgan's bowlers were unable to make the most of a well-grassed pitch and Leicestershire reached 164 for three off 51 overs at the close.
South African Ackerman, who has scored centuries against Glamorgan in each of the last two seasons, was again the thorn in their side and was still there at stumps on 89 not out.
Heavy overnight rain had left the outfield saturated and there was a four-hour wait before the game was able to get under way at 3pm, with 45 overs lost because of the delay.
Glamorgan captain David Hemp's decision to bowl first after winning the toss brought an early breakthrough with David Harrison picking up a wicket in his first over.
Matt Boyce was rapped on the pads and out lbwas he missed with a loose drive with the total at three.
But Ackerman and Tom New slowly but surely gained the initiative for the home side with a solid second-wicket partnership of 94 in 24 overs.
Ackerman set the tone by taking 11 runs off Jason Gillespie's third over, including two sweetly-timed boundaries through the offside.
New, after an uncertain start, also grewin confidence and by the 20th over, Glamorgan had turned to the spin of Robert Croft in search of another wicket.
But, with Ackerman consistently piercing the field with some powerful offside drives, Leicestershire reached tea at 89 for one, but then Newfell for 32 when he was unable to keep down a lifting delivery from Ryan Watkins and played the ball back into his stumps.
Ackerman, however, continued to dominate, reaching his 50 with nine fours and was joined in another half century partnership by South African colleague Boeta Dippenaar.
The two of them put on 56 in 20 overs, with Dippenaar contributing 22 before being bowled by Harrison.
That made it 153 for three and with only six overs remaining, Leicestershire sent in Nadeem Malik as night watchman.
He did the job, scoring only one run but surviving an awkward session for the home side, leaving Leicestershire on 164 for three off 51 overs.
TWO WICKETS: David Harrison