Durham inflicted a first Friends Life t20 defeat on North Group leaders Nottinghamshire with a 33-run victory at Chester-le-Street.
Durham opener Phil Mustard lashed 75 off 41 balls as the hosts racked up 187-6, Darren Pattinson taking 3-31.
The Outlaws' chase started brightly as they reached 105-1 inside 12 overs but they crumbled to 128-6 soon after before settling on 154-8.
Durham had 67 on the board after the six-over powerplay and Mustard reached 50 off 28 balls by driving Andy Carter over mid-off for his eighth four in the eighth over.
He departed in the 12th over when he drove at a slower ball wide of off stump from medium pacer Steven Mullaney and was stumped by Chris Read.
Paul Collingwood made only eight before going down the track and having his stumps splattered by Carter.
The runs were really drying up when South African David Miller declined Ian Blackwell's call for a leg bye and the ex-Somerset man was run out for 43, made off 27 balls.
Dale Benkenstein became the third run out victim when he drove to mid-off and had no chance of beating Pattinson's direct hit.
Alex Hales got the reply off to a flyer with four boundaries and a six before Adam Voges and Riki Wessels put on 68 for the second wicket when Voges fell for 46, clipping Blackwell to Collingwood at mid-wicket.
When David Hussey tried to get off the mark off the next ball he succeeded only in running out Wessels for 32 and the rest perished to a series of frantic strokes as the Outlaws fell 33 runs short.