Durham clinched a place in the quarter-finals of the Twenty20 Cup, crushing Leicestershire by six wickets with 22 balls to spare in their final North Division group match at Grace Road.

With Mitchell Claydon and Ben Harmison taking three wickets apiece, the Dynamos restricted the Foxes to a meagre 133 for eight despite a fine captain's innings of 63 from Boeta Dippenaar.

Durham then made short work of the run-chase, reaching their target with time to spare after Australian David Warner struck a blistering 44 off 18 balls in an opening partnership of 75 in seven overs with Phil Mustard.

It was the sort of batting the Foxes simply could not match on the day. The Durham innings contained four sixes and 18 fours, while the Foxes could only muster two sixes and 13 fours.

The home side's innings stalled from the start, with only five runs coming off the first two overs from Neil Killeen and Claydon.

That set the tempo, and the scoring rate rarely rose much above six runs an over as the Durham attack kept a tight grip on things.

James Allenby - the Foxes' leading scorer in the competition - did manage to pull Harmison for a six over midwicket, but was then out in the same over, driving a catch to extra cover.

When the big-hitting Jacques du Toit also fell cheaply to a superb delivery from Killeen, the Foxes were in trouble, and it needed an outstanding effort from Dippenaar to give the innings some semblance of a total.

There was no-one else able to give him any support, however, with six of the side failing to reach double figures.

Claydon and Harmison bowled superbly, with Claydon taking three wickets for 14 runs and Harmison three for 28, as the Foxes managed just 33 runs off the middle five overs of the innings and 40 off the final 10.

Dippenaar, having made his first half-century in the competition, was finally out for 63 off 48 balls with a six and seven fours, edging a catch to Mustard off Killeen.

Warner and Mustard then set the tone of the Dynamos' reply with a magnificent opening partnership during the first seven overs.

Warner was in superb form, and when he was finally caught at deep midwicket he had blasted three sixes and five fours.

The left-hander eventually fell to left-arm spinner Claude Henderson, who then claimed the wickets of Mustard and Kyle Coetzer to finish with three for 32.

But it was all in vain for the Foxes as Durham eased to victory, with Dale Benkenstein hitting the winning boundary off the second ball of the 17th over to take Durham into the quarter-finals, where they will travel to Kent.