Borthwick takes the final two wickets to wrap up win before lunch
Durham eased their own relegation fears with an innings victory over fellow strugglers Surrey inside three days at Chester-le-Street.
Resuming on 69-5 in their second innings and still 112 behind, the visitors were unable to even force their opponents to bat again as they were bowled out for 143.
Any hopes they had of an unlikely turnaround on Thursday suffered an early blow when Tom Linley went for a duck before a run had been scored.
When opener Rory Burns, who had battled hard to make 39 from 130 deliveries, became the seventh wicket to fall before the total had reached three figures, Surrey must've known the game was up.
Callum Thorp had Martin Spriegel caught for 17 to make it 114-8 and although Gareth Batty delayed the inevitable with 22, Durham managed to wrap up a comprehensive victory before lunch.
Leg-spinner Scott Borthwick took the final two wickets, clinching his side a crucial 22-point haul that lifts them above Surrey and into sixth place in the Division One table.
Durham continued their revival under new captain Paul Collingwood as they put themselves in a strong position at the halfway stage of their clash with fellow strugglers Surrey.
The visitors closed the second day at Chester-le-Street on 69-5 in their second innings, still 112 behind, and are in danger of emerging from a crucial Division One match without a point.
They have already gained three bowling points for dismissing Durham for 310, though they could yet be lost because their over-rate reads minus three.
They may not get an opportunity to do anything about it either, with Ben stokes following up his four-wicket haul in the first innings with a further two scalps second time around, leaving Surrey in a battle to avoid an innings defeat.
Collingwood (78) and Dale Benkenstein (69) had earlier both made their best score of the season for Durham, combining in a fifth-wicket stand of 132.
Former skipper Phil Mustard chipped in with 46 as Durham gained three batting points after totalling only two in the five previous home matches.
Durham assumed early control of their LV= County Championship relegation battle with Surrey, bowling out their opponents for 129 on the opening day.
Ben Stokes led the way with 4-40 - his best figures of the season so far - as the hosts skittled their fellow Division One strugglers in just 48.3 overs at Chester-le-Street.
Surrey had at one stage reached 41-1 before slipping to 67-5 at the start of the afternoon session, their cause not being helped by the run out of Jason Roy two balls before lunch.
After coming together at 80-7, acting captain Gareth Batty (11) and Jon Lewis (23) put on a stand of 37, before both departed with the total on 117.
Durham also suffered a top-order collapse in their reply, going from 37-1 to 58-4. They too were not helped by a run out, debutant Keaton Jennings being caught short by Zander de Bruyn's throw from gully.
However Paul Collingwood and Dale Benkenstein tipped the balance Durham's way, the experienced duo sharing an unbroken stand of 61 to take Durham to 119-4 by the close of play.
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