Australian Simon Katich hit 59 not out to help Hampshire to an easy four-wicket win over Durham in their CB40 clash at the Ageas Bowl.
Katich hit three sixes and a four in his innings as Hampshire got home with 10 balls to spare when chasing down Durham's score of 200-7 from their 40 overs.
Hampshire were 201-6 when Kabir Ali gleaned the winning single off Mitchell Claydon.
Gordon Muchall underpinned Durham's total with a brave and defiant 96 not out, coming in at 41-3 with his side finding it hard to get the better of a wet outfield.
Muchall struck five fours and two sixes off 99 balls, sharing in an important stand of 83 for the fifth wicket with Dale Benkenstein, who made 31.
Paul Collingwood contributed 28 and it might have been more had he not been beaten by a throw from Jimmy Adams at extra cover when the Durham total was 59.
When Hampshire responded they were given a solid base by Adams and fellow opener James Vince who put on 73 for the first wicket.
Katich twice hit Borthwick for six and did the same to Ben Stokes before finding the perfect ally in Dimitri Mascarenhas.
With 30 required off 29 balls at the fall of Dawson's wicket at the start of the 36th over, Katich and Mascarenhas went on the offensive.
The sixth wicket pair had put on 28 in 15 balls and with Hampshire now needing two runs, the rest was a formality.