Monty Panesar completed match figures of 11 for 168 as Essex eased to their fourth LV= County Championship Division Two win of the season as they beat Glamorgan by 63 runs on the final morning at Swansea.
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The victory keeps up Essex's hopes of getting into the fight for promotion, while it was Glamorgan's fourth straight defeat.
Glamorgan had required 111 to win with only two wickets remaining when they resumed on 237 for eight.
It took Essex only 14 balls to break the ninth-wicket partnership when Graham Wagg
(64) became Panesar's sixth victim of the innings.
Wagg and Dean Cosker had ensured the match went into the fourth day after surviving the final 14 overs on Sunday after Essex had claimed the extra half-hour.
But in the third over of the morning Wagg went to a bat and pad catch to Nick Browne at short leg.
Cosker and Michael Hogan also frustrated Essex for nine overs, adding 43.
But after 35 minutes of play Hogan gave Tom Westley a return catch to confirm Essex's victory.
Essex took an important 21 points from the match to Glamorgan's three.