Michael Yardy anchored Sussex's 355 for eight with 126 not out which spanned almost the whole of the first day against Kent at Hove.
The stoic left-hander faced the second ball of the Division One match - after Richard Montgomerie's dismissal - and hit 13 fours while receiving 298 deliveries.
His watchfulness was a necessary foil to the shot-makers who came and went around him, notable among whom was Zimbabwean Murray Goodwin who reached 82 in dominating of a third-wicket stand of 141.
Alex Gidman and Steve Adshead batted Gloucester-shire out of trouble on the opening day of the Division Two match against Essex at Bristol.
After winning the toss, the home side slipped to 139 for five, despite 70 by opener Craig Spearman, as Alex Tudor took three wickets and Darren Gough two.
But Gidman (87) and exWorcestershire batsman Ads-head (68) added 129 for the sixth wicket and Gloucester-shire closed on 355 for eight, having gained four bonus points on a true pitch.