Glamorgan 139 and 334 for 7 (Ingram 102, Root 99*) beat Worcestershire 271 and 199 (Neser 4-50) by three wickets
Billy Root was again the chief thorn in Worcestershire's side in leading Glamorgan to a three-wicket win over Worcestershire in the LV=Insurance County Championship match at New Road.
Two years ago Root had blunted Worcestershire's victory hopes with a splendid century on the return to cricket after the pandemic in the Bob Willis Trophy.
Today he was their match-winner with 99 not out after Colin Ingram's hundred yesterday had laid the foundations in pursuit of a 332 target.
Root struck 11 fours in his 172-ball knock to seal Glamorgan's fourth win of the season in the Championship.
All of them have involved successful run chases after victories over Nottinghamshire (seven wickets), Leicestershire (six wickets) and Sussex (five wickets).
This latest triumph represented a splendid recovery after being bowled out for 139 in their first innings and conceding a lead of 132 and keeps them well in the hunt for promotion.
But for Worcestershire it was a severe blow to their own hopes of finishing in the top two as a way of compensating for a dismal Vitality Blast campaign.
The game was perfectly poised heading into the final day with Glamorgan needing 100 runs and Worcestershire five wickets for victory on a pitch still offering encouragement to the seamers.
The second new ball was also immediately available with Joe Leach, who had taken a career best 6 for 44 in the first innings, and Charlie Morris sharing the attack.
Root resumed on 46 and he brought up a 99-ball half century with the first of two cover drives for four in a Leach over.
There were still the occasional balls climbing off a length and one such delivery flew past the outside edge of nightwatchman James Harris.
He had survived 38 balls before driving at Leach and edging through to keeper Gareth Roderick.
New batter, Tom Cullen, immediately looked in good touch and produced the shot of the day with a drive back down the ground off Leach to the boundary.
Root looked in little trouble although on 74 he was relieved to inside-edge a delivery from Dillon Pennington just past his leg stump.
Spin was introduced via Josh Baker and Root used his feet to loft him back down the ground and reduce the target needed below 40.
But then Tom Fell, a concussion replacement for Taylor Cornall, produced a superb one-handed catch at third slip to dismiss Cullen after Leach returned to the attack.
Michael Neser survived a one-handed caught-and-bowled chance on two after Ed Barnard came into the attack.
It was the last throw of the dice for the home side and Root and Neser completed victory for the visitors with few alarms.