Part-time off-spinner Chris Nash produced career-best figures to help Sussex to a 201-run triumph over Glamorgan in their opening match of the LV County Championship season.
The final day at the Swalec Stadium saw Glamorgan put up a stubborn fight thanks to Ben Wright (57) and James Allenby (62), but the Welsh side's downfall was hastened by the arrival of Nash, who took two wickets from his first three balls and finished with figures of 4 for 12 from 9.3 overs.
Glamorgan had resumed on 51 for one in their second innings, looking for an unlikely 405 to win, and it took Corey Collymore only until the seventh over to break through - trapping Michael Powell lbw.
Nightwatchman Dean Cosker also went lbw three overs later, but Sussex's impending victory was delayed by the stand between Wright and Allenby.
Skipper Michael Yardy then brought Nash into the attack, and the spinner broke the sixth-wicket pair immediately, getting Wright caught at slip before Mark Wallace chopped onto his stumps two balls later.
James Harris was Nash's next victim in his seventh over, and he closed out the victory by having Chris Ashling caught behind as Sussex won the Division Two contest 35 minutes before tea.
Sussex appear to be heading for victory in their match at Glamorgan, with all-rounder Robin Martin-Jenkins playing a major role for the visitors on Sunday.
Having set the home side 405 to win in a minimum of 122 overs, Sussex reduced them to 51-3 on day three - Martin-Jenkins first making an unbeaten 33 before claiming two Glamorgan wickets.
Resuming their second innings on 65-1, Sussex lost Chris Nash, James Anyon, Joe Gatting and Luke Wright before lunch as they stumbled to 126-5.
But sixth-wicket pair Michael Thornely and Murray Goodwin (83) then asserted themselves to guide Sussex to a 300-run lead.
They reached 294-8 at tea and then declared to leave Glamorgan needing to survive 26 overs.
However, Will Bragg fell to Corey Collymore before Martin-Jenkins claimed the wickets of Gareth Rees and Jamie Dalrymple in 16 balls.
Sussex's bowlers put the Division Two favourites in a strong position at the halfway stage of their clash with Glamorgan at Sophia Gardens.
Having been bowled out for 284 on the opening day, Mike Yardy's side seized control by skittling the hosts for 191 in just 69.5 overs.
Monty Panesar marked his debut for his new county with 3-20 after seamer Robin Martin-Jenkins (3-34) had ripped out Glamorgan's middle order.
Mike Powell top-scored with 48 before falling to Marti-Jenkins, who also dismissed Ben Wright for 10 and Jim Allenby for a second-ball duck.
Left-arm spinner Panesar, who has moved to Hove in the winter from Northamptonshire, rattled his way through the tail to end the innings in a hurry.
Starting their second innings with a 93-run lead, Sussex reached 65-1 by the close. Yardy was the only wicket they lost late in the day, the left-hander being trapped leg before by veteran spinner Robert Croft having made 34.
Glamorgan paceman James Harris claimed 4-68 as Sussex were bowled out for 284 all out on the first day of the new LV County Championship season.
Harris did the early damage, accounting for four of the top six as Sussex - starting life in Division Two after relegation - were reduced to 153-6 in mid-afternoon.
Number eight Robin Martin-Jenkins resisted with a half-century but left-arm spinner Dean Cosker (3-43) ran through the tail, including Monty Panesar for a first-ball duck on his Sussex debut, to reassert the home side's dominance.
Martin-Jenkins was last out for 65 in the final over of the day.