Tom Maynard cracked the fastest century in Glamorgan's history but it was not enough to prevent Northamptonshire celebrating their first NatWest Pro40 victory of the season.

When Maynard came to the wicket Glamorgan were 103 for three in the 22nd over needing 269 for victory.

But he hit a remarkable century off only 57 balls, including four sixes and 14 fours.

However, with 24 needed for victory from 12 balls, Maynard was bowled by Johan van der Wath in the penultimate over.

The platform for Northamptonshire's six-run victory was laid by Stephen Peters and Niall O'Brien during an opening stand of 153 in 24 overs, a one-day record for any wicket at Colwyn Bay.

That set the Steelbacks, who won the toss, on their way to an imposing total of 267 despite four wickets for Robert Croft.

The opening pair, who took the score to 100 from the opening 15 overs, looked completely untroubled as they both cruised to their half-centuries in the 17th over, Peters off 50 balls and O'Brien 52.

But Croft's introduction into the attack turned the innings as he took four wickets for 11 in 17 deliveries.

The breakthrough came when Croft trapped O'Brien in front for 82, made off 73 balls.

Andrew Hall also fell to the veteran off-spinner, and his third wicket arrived when Peters, who made 69 off as many deliveries, chipped him straight to Dean Cosker at midwicket.

The former England star, who finished with 4-43, completed his haul by taking a return catch to account for Alex Wakely.

From 172 for four, Nicky Boje made 43 from 30 balls but skied a return catch to David Harrison late in the innings.

Despite 73 from Gareth Rees, Glamorgan fell well behind the rate until Maynard injected some much-needed impetus, hitting both Boje and Monty Panesar for straight sixes.

However, he lost Rees, who reverse swept Boje straight to deep point, and partners deserted him at regular intervals thereafter.

His only consolation was a standing ovation for a magnificent hundred.