Match scores (Riverside Ground)
Durham won by 19 runs
Durham inns: 291-7 (50/50 overs. Jennings 101, Richardson 68, Collingwood 53*; Sanderson 3-36, Gleeson 2-59)
Northants inns: 272/8 (50/50 overs. Rossington 69, Levi 66, Crook 48; Coughlin 3-53)
Match report
Keaton Jennings and Michael Richardson continued their superb form with a stand of 158 to propel Durham to a 19-run Royal London One-Day Cup win against Northamptonshire at Chester-le-Street.
Jennings' 101 was his second century of the series and took his aggregate to 403 from five games, while Richardson boosted his tally to 351 by making 68.
Durham wobbled when both fell in quick succession, and from 186 for one in the 34th over they lost momentum and slipped to 227 for five. But it was picked up brilliantly by Paul Collingwood with an unbeaten 53 from 43 balls as the last seven overs yielded 64 runs, Durham reaching 291 for seven in their 50 overs.
The home side had made a cautious start after being put in under heavy cloud and Stephen Cook fell lbw to Ben Sanderson, who proved the pick of the Northamptonshire bowlers with three for 36.
The score had reached 79 after 20 overs when left-arm spinner Graeme White conceded only three in a tight first over. But his second cost 14 after Richardson picked him up him over the mid-wicket rope, then pulled him for four.
When Northamptonshire tried spin at the other end, Jennings on-drove Rob Keogh for his fifth four to reach 50 from 66 balls, one faster than his partner.
Richardson cut Richard Gleeson over third man for his second six and, at 159 after 30 overs, 80 runs had come from the previous 10.
Jennings helped a poor ball from Sanderson to fine leg for a 13th four to reach his century from 105 balls. But then both batsmen departed.
A firm cut by Richardson lodged in the hands of White low down at backward point, and then Jennings tried to hit Sanderson down the ground and miscued to deep mid-on.
Former England man Collingwood lifted the total beyond Northamptonshire's reach, even though it became a close-run contest.
Northamptonshire's challenge looked to have ended when a brilliant stop and direct hit from extra cover by Collingwood ran out Richard Levi for 66.
But at 124 for five in reply to 291 for seven, Adam Rossington and Steven Crook revived the visitors' hopes with a stand of 99 in 16 overs.
Rossington reached 50 from 43 balls, and with 89 needed from 10 overs the balance was tipping when he lofted the first two balls of a Chris Rushworth over for six over long off and backward square.
But on 69 he tried a scoop shot off Paul Coughlin and lost his middle stump, leaving Crook with too much to do. He holed out at deep mid-wicket for 48 in the 48th over and Northamptonshire finished on 272 for eight.