Sussex’s final wicket pair survived 21.2 overs to save the game, with Glamorgan left frustrated as they were one wicket short of leapfrogging their second placed opponents in the table.
Sussex finished on 273-9, 85 behind, Oli Carter on 55 not out and number 11 Henry Shipley unbeaten on 8.
The visitors’ rearguard action kept them second in the table as this game finished in a nail-biting draw, after 15 overs were lost to rain in the morning.
Australian leg spinner Mitch Swepson led the way for the Welsh County with four wickets, Jamie McIlroy and James Harris taking two each, but it was the final wicket that was to prove elusive.
Wicketkeeper Carter survived 149 deliveries, Shipley 56, after Nathan McAndrew’s earlier rapid 42 showed brief promise of Sussex chasing down the target, before the wickets started to fall.
Sussex nightwatchman Ari Karvelas had said his side would go for victory, but he went early and the game slowed down with Tom Clark and Tom Alsop struggling to score runs from Swepson in particular.
Alsop was clearly a key wicket for the home side to target as the visitors reached lunch with just two wickets down, but after the break James Harris pinned the skipper LBW from round the wicket.
He was replaced at the wicket by all-rounder McAndrew in a clear declaration of intent that Sussex were prepared to have a bit of a dash to try and win the game.
Clark survived a big LBW shout from Swepson, but then next ball the same sort of delivery was that little bit closer and he had to depart.
The aggression levels went up with McAndrew prepared to take on the bowling and more than happy to take the aerial route to the boundary whenever possible.
He hit Swepson out of the attack to see the pace of Jamie McIlroy replacing him, but that hurried the Australian into a mis-hit off a shorter ball which was caught at mid-on by Glamorgan captain Kiran Carlson.
That brought the end of an innings which brought 42 runs off 40 deliveries, the sort of rate which would have made things much more interesting if he had carried on.
Sussex continued to take a positive approach with James Coles leading the way, until he was impressively caught behind for 35 by wicket keeper Chris Cooke standing up to seamer McIlroy.
Dan Ibrahim was next to go, sweeping a leg side delivery from Swepson but top edging to Zain ul-Hassan at backward square leg.
However, the visitors maintained a positive approach, reaching tea with seven wickets down and still needed 154 to win.
Their eighth wicket fell after tea, Harris setting three men back on the hook and then yorking Fynn Hudson-Prentice with the middle stump coming out of the ground.
Oli Carter was dropped on 37 by Billy Root at square leg off McIlroy, but Root atoned by making no mistake with Jack Carson off the bowling of Timm van der Gugten to leave Glamorgan needing one more wicket for victory with more than 20 overs remaining.
They had one difficult chance, Carter slashing van der Gugten high to the right of -ul-Hassan at first slip. Despite the regular appeals in the closing overs, that proved to be it for home hopes.
Sussex finished on 273-9, 85 behind, Oli Carter on 55 not out and number 11 Henry Shipley unbeaten on 8.
The visitors’ rearguard action kept them second in the table as this game finished in a nail-biting draw, after 15 overs were lost to rain in the morning.
Australian leg spinner Mitch Swepson led the way for the Welsh County with four wickets, Jamie McIlroy and James Harris taking two each, but it was the final wicket that was to prove elusive.
Wicketkeeper Carter survived 149 deliveries, Shipley 56, after Nathan McAndrew’s earlier rapid 42 showed brief promise of Sussex chasing down the target, before the wickets started to fall.
Sussex nightwatchman Ari Karvelas had said his side would go for victory, but he went early and the game slowed down with Tom Clark and Tom Alsop struggling to score runs from Swepson in particular.
Alsop was clearly a key wicket for the home side to target as the visitors reached lunch with just two wickets down, but after the break James Harris pinned the skipper LBW from round the wicket.
He was replaced at the wicket by all-rounder McAndrew in a clear declaration of intent that Sussex were prepared to have a bit of a dash to try and win the game.
Clark survived a big LBW shout from Swepson, but then next ball the same sort of delivery was that little bit closer and he had to depart.
The aggression levels went up with McAndrew prepared to take on the bowling and more than happy to take the aerial route to the boundary whenever possible.
He hit Swepson out of the attack to see the pace of Jamie McIlroy replacing him, but that hurried the Australian into a mis-hit off a shorter ball which was caught at mid-on by Glamorgan captain Kiran Carlson.
That brought the end of an innings which brought 42 runs off 40 deliveries, the sort of rate which would have made things much more interesting if he had carried on.
Sussex continued to take a positive approach with James Coles leading the way, until he was impressively caught behind for 35 by wicket keeper Chris Cooke standing up to seamer McIlroy. Dan Ibrahim was next to go, sweeping a leg side delivery from Swepson but top edging to ul-Hassan at backward square leg.
However, the visitors maintained a positive approach, reaching tea with seven wickets down and still needed 154 to win.
Their eighth wicket fell after tea, Harris setting three men back on the hook and then yorking Fynn Hudson-Prentice with the middle stump coming out of the ground.
Oli Carter was dropped on 37 by Billy Root at square leg off McIlroy, but Root atoned by making no mistake with Jack Carson off the bowling of Timm van der Gugten to leave Glamorgan needing one more wicket for victory with more than 20 overs remaining.
They had one difficult chance, Carter slashing van der Gugten high to the right of -ul-Hassan at first slip. Despite the regular appeals in the closing overs, that proved to be it for home hopes.