Essex 197 for 8 (Rossington 95, Westley 54, Rashid 3-30) beat Sussex 169 for 8 (Bopara 47, Harmer 3-18) by 28 runs

Harmer conceded just 18 runs from his four overs and also picked up the wickets of danger man Ali Orr, Tom Alsop and George Garton. It was the eighth win of the campaign for Essex, who are assured of a top-four spot, as Sussex disappointed once again before a sell-out crowd.

But Orr, the hero of Sussex's first championship win of the season two days before, threatened more heroics as Sussex chased a challenging 198 for victory.

Sussex took just five runs from Aaron Beard's first over but then Orr plundered 25 runs off the second over, bowled by Daniel Sams, the sequence going six, six, four, four, four and one.

After just four overs Sussex were 54 without loss, with Orr flying on 36. Josh Philippe was caught behind for 17 in the fifth over but after seven overs Sussex were better than on target, at 81 for one. But then Orr's odyssey came to an end as he skied Harmer to midwicket. His 41 had come off just 21 balls, and there were five fours and two sixes.

Sussex were ahead of the game at the halfway stage, at 101 for two after ten overs. But then Harrison Ward holed out to the deep midwicket boundary for a 22-ball 31 and a brave 28-ball 47 from Sussex captain and former Essex man Ravi Bopara was not enough.

Rossington brought up the fifty in the sixth over as he drove Henry Crocombe for a straight four, the bowler's first three deliveries going for boundaries.

But Sussex battled their way back into the match by taking three wickets in the space of ten deliveries. Delray Rawlins bowled Robin Das, Michael Pepper, reverse sweeping, was brilliantly caught by Ali Orr, diving to his right at backward-point, and Dan Lawrence was bowled by Ravi Bopara's second ball.

Rossington moved to 95 with a six over long-off but was stumped next ball and it was Essex's red ball captain Tom Westley, with a 30-ball 54, who was responsible for ensuring his side reached a challenging total. Westley struck three fours and four sixes, hitting George Garton out of the ground over the hospitality area at cow corner.

Rashid Khan was once again the best Sussex bowler with three wickets for 30 runs while Bopara (2-30) and Rawlins (2-34) also bowled well.