Surrey secured a 19-run victory over Gloucestershire in their Group A day-night clash at the Seat Unique Stadium, Bristol, behind a dominant top-order performance and disciplined bowling. Match-Winning Stand: Dom Sibley scored his sixth List-A century (101 off 126 balls) and built a crucial 143-run partnership with Rory Burns, who contributed 89 off 84 balls. Late Finish: A rapid late-innings surge by Josh Blake (36 off 17 balls) pushed Surrey to a formidable total of 311/5. Gloucestershire's Collapse: Despite a strong start from openers James Bracey (39) and Cameron Bancroft (33), Gloucestershire suffered a mid-innings collapse, losing 5 wickets for 63 runs. Fighting Counter-Attack: Captain Graeme van Buuren kept the chase alive with a spirited 85 off 79 balls, but the home team ultimately ran out of overs, being bowled out for 292. Surrey's top-order realised the importance of steady accumulation on a sluggish pitch of variable bounce, and there were no heroics as Sibley and Adam Thomas expertly rotated the strike in a businesslike second-wicket stand of 88 in 17.5 overs. Looking to cut Daz Ahmed, Thomas edged behind to James Bracey and departed for 41 with the score 106 for 2. Sibley then offered a chance on 46, Ahmed fumbling off his own bowling. It proved a turning point. 143-Run Partnership: Dom Sibley reached his half-century off 71 balls, while Rory Burns maintained a brisk pace to complete his fifty off 48 balls. Together, they brought up their 100-run stand in just 93 deliveries. Century & Wickets: Sibley brought up his century off 124 balls (including 9 fours) before edging behind off Jack Taylor. Burns fell just short of a maiden List-A hundred in the following over, out for 89 (12 fours, 1 six) to Ollie Price with the score at 255/4 in the 45th over. Late Flourish: Josh Blake provided a powerful finish, smashing 36 runs from 17 balls and leading a 43-run 5th-wicket partnership with Ollie Sykes to push Surrey to their final total of 311. Van Buuren and Kamran Dhariwal attempted a recovery, only for the latter to play down the wrong line to slow left-armer Albert with a further 152 needed. Despite van Buuren's half century and seventh-wicket alliance of 52 with Ahmed, it proved too big an ask, Taylor accounting for Ahmed and Floros running out Aman Rao. Surrey 311 for 5 (Sibley 101, Burns 89) beat Gloucestershire 292 (van Buuren 85, Albert 3-48) by 19 runs