Surrey recorded their first win in the rebranded NatWest T20 Blast with a 14-run success against Somerset at Taunton.
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Jason Roy's 64 was the mainstay of Surrey's 173 for seven and it proved enough despite a similarly aggressive 61 from Craig Kieswetter.
It saw Surrey recover from their last-ball defeat to Sussex on Friday, while Somerset were unable to follow up their win over Gloucestershire.
Roy and opening partner Graeme Smith put on 29 in 23 balls before Smith was caught by Alviro Petersen off Lewis Gregory for 20.
The six-over powerplay yielded 57 runs and Surrey advanced to 95 before the expensive George Dockrell had Steven Davies caught in the deep by James Hildreth for 24.
The century came up in the 11th over and Roy reached a 33-ball half-century featuring four fours and three sixes.
Gary Wilson became Ireland team-mate Dockrell's second victim, the spinner's figures of two for 36 representing a good comeback after 23 came from his first seven balls.
Kevin O'Brien made just three and when Alphonso Thomas took the crucial wicket of Roy, well caught at mid-off by a diving Max Waller, the momentum seemed to be shifting.
Robin Peterson also went for three but Azhar Mahmood lifted Surrey with 27 off 15 balls before being run out off the last ball.
Marcus Trescothick was run out for eight early in Somerset's reply and Peter Trego (one) skied a catch to third man, but Kieswetter scorched his way to a 31-ball half-century.
He hit a four and a six as 14 runs came off the second over, bowled by Mahmood, and took two boundaries off Tom Curran in a fourth over also featuring five wides off a dreadful leg-side delivery.
His seventh four, off O'Brien, took him to 48 before a succession of singles completed his half-century.
Petersen had proved an able ally but, having made 23 from 17 balls, he lofted Zafar Ansari to Aneesh Kapil at deep cover.
And key man Kieswetter went for one big shot too many, heaving Ansari high into the Taunton skies but straight down the throat of O'Brien, who celebrated exuberantly.
Nick Compton followed for 12 off the first ball of the next over and though Thomas improvised his way to 19 not out from 12 balls, Somerset came up short.