|NatWest T20 Blast, Nevil Road|
|Gloucestershire 138-7 (15 overs) beat Sussex 125 (14.4 overs) by 13 runs|
Ian Cockbain struck 52 off 36 deliveries to help Gloucestershire beat Sussex by 13 runs in the T20 Blast.
In a match shortened to 15 overs per side by rain at Bristol, Cockbain shared a stand of 68 with Alex Gidman for the second wicket following the early loss of Chris Dent.
Will Gidman then hit an unbeaten 26 from 16 balls and Graeme McCarter made 16 not out as they finished on 138-7.
Jack Taylor took 3-12 as Sussex could only muster 125 all out in reply.
Gloucestershire director of cricket John Bracewell:
"We are getting some momentum in the competition.
"Payers are fronting up when it matters and we remain in the hunt for a quarter-final place."
Sussex coach Mark Robinson:
"T20 is a game that is often decided by inches. If Marshall had touched the boundary it would have been six and we would still have had a chance.
"It was so dark at the end, but T20 is all about entertainment and we have just lost an excellent game of cricket."