Craig Kieswetter followed up his stunning century on Saturday with another blistering ton as Somerset thrashed Durham by eight wickets to keep alive their hopes of making the semi-finals of the Clydesdale Bank 40.
Fresh from his match-winning 152 in the LV= County Championship success over Warwickshire on Saturday, Kieswetter scored 103 as Somerset overcame Durham's 147 with almost half their 40 overs to spare at Taunton.
The England one-day wicketkeeper plundered nine fours and six sixes in his 61-ball innings as last season's runners-up climbed off the bottom of Group B with their second successive victory in the competition. Somerset were also boosted by the return of Marcus Trescothick, three months after he ruptured ankle ligaments.
There were also big wins for Middlesex and Sussex.
Middlesex climbed to the top of Group A after thrashing Gloucestershire by 10 wickets thanks to impressive knocks from openers Chris Rogers and Dawid Malan.
Rogers scored an unbeaten 122 while Malan finished on 89 not out as Middlesex comfortably passed Gloucestershire's 214 for nine with almost 10 overs to spare.
The victory saw Middlesex steal a crucial march on their opponents in the race for a semi-final place, having started the day in second spot in Group A on 10 points, one more than third-placed Gloucestershire.
Sussex, meanwhile, cruised to an eight-wicket win over Northamptonshire at Arundel to consolidate their place at the top of Group C.
Chris Liddle took four for 21 and Scott Styris two for 12 as Northamptonshire were bowled out for 129 after James Middlebrook (37) and Rob Keogh (30) had rescued them from 46 for six at one stage.
Murray Goodwin then scored an unbeaten 67 and put on 96 for the third wicket with Ed Joyce (38 not out) as Sussex eased home in the 31st over.