Durham moved joint top of Group B in the Clydesdale Bank 40 League after a Phil Mustard-inspired win over Warwickshire at Chester-le-Street.
The former England one-day wicketkeeper made his highest one-day score of 129 not out as Durham remained just below Surrey, who have two games in hand, on run-rate.
They passed Warwickshire's 240 for five with 2.3 overs to spare after Mustard and Michael Di Venuto began the reply with a stand of 110. The Tasmanian reached 50 off only 36 balls, 10 faster than his partner, before he miscued to mid-off in the 16th over.
From that point Durham were able to coast along, but a reverse sweep for his 11th four off Chris Metters took Mustard to his hundred off 91 balls. His one six came when he flicked medium-pacer Steffan Piolet over backward square leg.
The Bears' total seemed light as, after taking only a single off each of the first two overs, Mustard and Di Venuto cracked 45 runs off the next four meaning that despite the loss of five wickets they always looked in complete command of the situation.
After Warwickshire chose to bat, Will Porterfield again showed his liking for the Durham attack by making 74 off 77 balls, including a third wicket stand of 106 with Jim Troughton before they fell in identical fashion to successive balls in the 34th over.
A slog-sweep off Gareth Breese, which flew to the boundary in front of square, had taken Porterfield to 50 off 51 balls and Troughton got there two balls faster.
But when they called their batting powerplay but it was Durham who profited as three wickets went down for seven runs.
Mitch Claydon finished with three for 34, having persuaded opener Neil Carter to edge a drive to Mustard during an opening spell in which Graham Onions was also impressively accurate.
Onions also returned during the batting powerplay to have Chris Woakes caught behind before Keith Barker hit two sixes in the last two overs in his unbeaten 29 off 20 balls.