Match scores (Taunton)
Somerset won by four wickets
Surrey inns: (50/50) 290-8 (Foakes 92, Stoneman 56, Sibley 37; Overton 3-57, Gregory 3-71)
Somerset inns: (43.5/50) 291-6 (Van der Merwe 165*, Elgar 68; Dernbacj 3-46, S Curran 2-52)
Match report
A maiden one-day century by Roelof van der Merwe helped Somerset pull off an incredible four-wicket win over Surrey in the Royal London One Day Cup South Group at Taunton with more than six overs to spare.
Surrey were restricted to 290 for eight from their 50 overs, Ben Foakes top-scoring with 92. In reply Somerset crashed to 22 for five and looked out of it before Van der Merwe (165 not out) and Dean Elgar (68), came together to lay the foundation for this victory with a sixth-wicket stand of 213.
Somerset eventually reached 291 for six, with 37 balls remaining, after one of the most dramatic turnarounds in a one-day contest.
Opener Mark Stoneman looked in great form after Surrey had been put in and along with Dominic Sibley saw up the 50 in the 11th over.
But soon after going to his half century off 49 balls, with six fours, he was caught at third man off Lewis Gregory.
Kumar Sangakkara kept the total moving and saw up the Surrey 100. Sibley had moved onto 37 when he went down the wicket and was caught by wicketkeeper Steve Davies for 37, Gregory the successful bowler.
Josh Davey then changed ends and immediately had Rory Burns sharply caught at short mid-wicket by Jim Allenby for 15. Two overs later Davey had Sangakkara caught behind for 32.
Foakes looked in great form and saw up the Surrey 200 with a single off Craig Overton, but two balls later the bowler accounted for Scott Borthwick who was caught at mid wicket for 19.
Foakes went to his half-century with a straight drive and while he was at the wicket Surrey looked to be heading for a big total.
The Somerset bowlers had other ideas, though, as both Sam and Tom Curran went cheaply. Foakes had moved onto 92, off 65 balls, with 11 fours, when he was caught at deep mid-wicket before Surrey ended on 290 for eight.
Overton ended with three for 57, Gregory three for 71 and Davey two for 45.
The Somerset innings got off to the worst possible starts as they were reduced to 22 for five in the seventh over. Jade Dernbach and Sam Curran claimed two wickets each as Steve Davies, Peter Trego, Jim Allenby, James Hildreth and Adam Hose departed in rapid succession.
Elgar and Van der Merwe then came together and gradually started the recovery. The South African-born pair kept up with the run rate and saw up the 100 in the 19th over.
In the next Elgar hit the first six of the innings off Gareth Batty. Two balls later Van der Merwe went to his 50 with two off the back foot, his runs coming off 44 balls with six fours shortly after which Elgar followed his runs coming off 62 balls with three fourss and a six.
Van der Merwe went to his century with a drive to the square-cover boundary off Tom Curran, having faced 77 balls and hit 15 fours. The partnership was worth 213 in 30 overs, a new List A Somerset record to bring the hosts right back into the game, before Elgar was bowled by Borthwick for 68.
Van der Merwe was joined by Gregory and the pair stayed in the middle to see Somerset home, the South African ending unbeaten on 165 off 122 balls with 24 fours and a six.