Mark Stoneman hit his maiden one-day ton to help Durham record a six-wicket win over Group B rivals Scotland in Clydesdale Bank 40 action.
The opener made an unbeaten 136 from just 117 balls as the English county comfortably chased down a target of 259 with more than six overs to spare.
Stoneman, who was dropped on two and 55, hit 18 fours and a six, sharing in a first-wicket stand of 207 with Phil Mustard, who contributed 91 to Durham's cause.
A century by South African left-hander Jean Symes had earlier propelled the Saltires to 258-4 - their second highest 40-over total ever.
Their final score was second only to the 267-4 they made against Warwickshire at Edgbaston two years ago, with Symes reaching three figures from 91 balls. He was eventually bowled by the last ball of the innings for 110.
Graham Onions bowled well for Durham on his return from his England commitments, ending a fluent opening stand of 33 by having Josh Davey caught at mid-off as he conceded only 27 runs in his eight overs.
Symes and Calum Macleod put on 86 in 15 overs before the latter fell for 48, while there were late contributions from Richie Berrington (29) and Preston Mommsen, who finished up unbeaten on 31.