Simon Harmer’s match figures of 14-131 was the difference as Essex beat Surrey by 169 runs in the Bob Willis Trophy.
Off spinner Harmer had taken 6-67 in the first innings, before producing 8-64 in the second.
Essex jump to the top of the South Group table, while heavily depleted Surrey remain the only winless side in the conference.
Harmer had started his haul with the last ball of the third day, when Mark Stoneman was leg before to one which didn’t turn – with Surrey requiring an unlikely 310 to win from the final day.
It took his 23 morning deliveries to breakthrough Scott Borthwick’s defences as the once-capped England Test player attempted a forward defence only to see the ball spin off his outside edge and into Adam Wheater’s gloves.
Surrey weren’t going to roll over and hand Harmer and Essex the wickets they required, with Ryan Patel and Will Jacks providing a blocking rear-guard.
Patel, in particular, seemed unmovable as he grappled to hold onto his wicket, showing intense concentration to see out 97 balls.
But the 22-year-old skied a pulled shot to Jamie Porter at midwicket while attempting to cash in on a shorter delivery from Harmer.
Jacks saw out 93 balls with his laser focus, while also putting on a 51-run stand with Jamie Smith – as the pair held Essex up for 20 overs.
But having refuelled over lunch, Harmer took his next two wickets in three balls.
Jacks, who had batted beautifully scored 70 in the first innings, attempted to go back and work to leg side only to be pinned – that brought up Harmer’s 10 wickets in the match.
Two balls later, Evans, on loan from Sussex, skipped down the track, missed the ball and was stumped by Wheater.
Rikki Clarke twice used his feet to strike Harmer for two boundaries down the ground but departed for 14 from 27 when Varun Chopra held on to a simple catch at short leg.
Wicketkeeper-batsman Smith once again showed why he is so highly rated at the Kia Oval with a two-hour vigil.
The 20-year-old scored 45 in 89 balls but departed at the hands of Harmer – although not through the South African’s bowling.
Smith edged Beard to second slip, where Harmer swooped low to pull off a stunning catch, which ended his own shot at immortality.
Harmer returned to his first-skill again in the next over as Gus Atkinson, who had hit him for six, ran past a straight one to be bowled.
Beard saw off James Taylor, caught at cover, for a seven-ball duck before Harmer wrapped up the victory at 3.35pm when Amar Virdi slapped to mid-off.
