Durham took another step towards the Twenty20 Cup quarter-finals as they inflicted a sixth successive defeat on hapless Leicestershire at Chester-le-Street on Friday night.
At the start of the series the Foxes had the best record in the competition and Durham the worst, but the Dynamos won by eight wickets with 6.3 overs to spare.
In his first appearance of the series following a foot injury, Steve Harmison took two for 12 in four overs as Leicestershire scrambled to 119 for eight, the third lowest Twenty20 total against Durham.
After choosing to bat the visitors lost HD Ackerman third ball to Shaun Pollock but had reached 36 for one after four overs when Harmison came on.
Jacques Du Toit skied the second ball to mid-on as Harmison conceded only two runs off each of his first two overs. He then had Jim Allenby caught at backward point as he bowled straight through his four overs.
Boeta Dippenaar skied an attempted pull off Liam Plunkett's first ball and Pollock ran 20 yards to his right to hold a good catch at fine leg.
Leicestershire had limped to 73 for four after 13 overs when leg-spinner Scott Borthwick was brought on. Paul Nixon smashed two of the first three balls for four and six in the mid-wicket area as 15 came off the 18-year-old's only over following his dream debut at Old Trafford on Tuesday.
Off-spinner Gareth Breese replaced him and took three for 17 as Leicestershire hit out in desperation. His victims included Nixon, who made 35 off 38 balls before falling lbw attempting a reverse paddle.
In Durham's reply Phil Mustard had eight fours in his 42 off 23 balls before his opening stand of 58 with Michael Di Venuto ended in the sixth over.
Mustard went for a big drive off medium pacer Daniel Rowe and skied a catch to cover, and Di Venuto was the only other batsman to fall, stumped for 40 off Claude Henderson.
That made it 93 for two in the 10th over, and skipper Dale Benkenstein comfortably guided Durham home with an unbeaten 21.