|Specsavers County Championship Division Two, 1st Central County Ground|
|Sussex v Glamorgan, day three|
|Glamorgan 335 and 30-1|
|Sussex 552-5 dec: Wells 181, Brown 159*, Joyce 106.|
|Sussex 6 pts, Glamorgan 4 pts|
Big hundreds from Luke Wells and Ben Brown gave Sussex a hefty first innings advantage of 217 runs over Glamorgan.
Their fifth-wicket stand of 294 was a record for the county against Glamorgan, as was their innings total of 552-5 declared.
Wells and Brown each recorded their best scores of the season as they took full advantage of a mostly docile pitch to set up a victory bid.
Glamorgan, left with 13 overs to bat, finished on 30-1.
Visitors' captain Jacques Rudolph did not field because of a bruised hand, while paceman Michael Hogan, who was off the field on day two with a head knock, bowled just 10 overs before departing again.
That left coaches Robert Croft and David Harrison on emergency fielding duties.
The fifth-wicket stand between Wells and Brown was the second highest against any opposition for the fifth wicket, just three short of the 297 posted by Jim Parks senior and brother Harry against Hampshire in Portsmouth in 1937.
Sussex will need a disciplined final day's bowling if they are to overcome Glamorgan resistance and the slow pitch.
Sussex batsman/wicket-keeper Ben Brown told BBC Radio Sussex:
"It was hard work out there but we managed to graft it out and the longer our time at the crease, the more tired they got, so to build a huge lead is fantastic.
"Days when you're breaking records are special days in your career that you'll always look back fondly on.
"I had an eye on my best score, but Wrighty (captain Luke Wright) was keen to declare, and he told us what our job was- so a little bit disappointing not to get a career-best but I'll take 159 not out.
"We've shown right from ball one our intent to win this game, the bowlers did fantastically well and if we bowl like that again in the second innings, I think we'll bowl them out."
Glamorgan acting captain Mark Wallace told BBC Wales Sport:
"It was a long five sessions in the field but they batted very well to be fair, we bowled well in parts but it's been a good (batting) pitch all game and hopefully it'll carry on being good.
"Owen Morgan's debut was a baptism of fire for him (bowling 42 overs) but he did brilliantly with the ball, it was as if he was a veteran out there as he contained good players.
"(Assistant coach) Dave Harrison came on to field for five overs and strained his calf so Crofty (coach Robert Croft) came on, it was like he hadn't been away as he wasn't very quick at the end of his career and he still isn't!
"It'll be a good challenge (to save the game), we probably left a few runs out there first innings and it'll be a good test for us."