Derbyshire Falcons fell to defeat at The Central Co-op County Ground, despite a maiden Derbyshire century from Matt Montgomery.
Maiden centuries from Adam Thomas and Ollie Sykes inspired Surrey to a 43 run win over Derbyshire Falcons.
Thomas scored 162 from 149 balls and Sykes 115 off 92 with Nathan Barnwell smashing an unbeaten 43 off 21 to take Surrey to 388 for 4.
Thomas and Sykes put on 265 from 207 balls to set a Surrey List A record for the third wicket, beating the previous highest of 200 by Alec Stewart and Graham Thorpe against Glamorgan at The Oval in 1989.
Matt Montgomery led a spirited Falcons chase with 114 from 110 balls and Caleb Jewell scored 77 off 55 but they came up short on 345.
It was only the second meeting between the two counties in 10 years and after Surrey chose to bat on an overcast morning, they quickly lost Rory Burns who played across the line at Zak Chappell.
Chappell was getting some movement which accounted for Nikhil Gorantla who was trapped on the crease in the 11th over by a ball that straightened.
Another wicket at that stage would have put the inexperienced visitors under pressure but Thomas and Sykes played superbly, mixing selective aggression with placement, helped by some erratic bowling.
Thomas reached his first 50 for Surrey off 58 balls with Sykes completing his half-century, which included three sixes, off only 47.
Sykes was striking the ball cleanly, twice pulling Pat Brown for six before dispatching spinner Joe Hawkins over the ropes on his way to a 79 ball hundred.
Thomas completed his century, which came from 122 balls, and then drove Brown for four to break the third wicket record.
He raced to his third 50 off only 20 balls and fell aiming for his seventh six when he was well caught by Harry Came at deep mid-wicket.
Sykes followed in the next over, top edging a pull at Nick Potts, but Barnwell plundered 25 off the last over from Brown to take Surrey to the highest List A score against Derbyshire.
The Falcons lost Harry Came cheaply but Jewell was dismissive against anything slightly off line and raced to 50 from 29 balls.
Surrey should have removed him on 64 when he pulled Barnwell to fine leg but the ball went through Ollie Hunt’s hands and over the ropes to bring up the Falcons 100.
The introduction of spin slowed the rate and brought the big wicket of Jewell who top edged a sweep at Yousef Majid in the 18th over and was well caught by Ralphie Albert at deep backward square.
But Montgomery was finding gaps in the field, reaching 50 from 47 balls and with Guest, added 88 from 75 balls before the Falcons skipper top edged a reverse sweep at Sykes.
Sykes deflected a Montgomery drive onto the stumps to run out Martin Andersson but Amrit Basra hit the ball powerfully to score 39 from 26 balls before he was lbw sweeping Sykes.
Montgomery completed a fine hundred but with the rate climbing he top edged Ari Karvelas to end the Falcons hopes.
