New Zealand seamer Mitchell McClenaghan claimed three wickets on his county debut to help Lancashire open their Friends Life t20 campaign with a nine-run win over Durham at Chester-le-Street.
Set a target of 166, Durham ended short on 156-8 as left-armer McClenaghan recovered from a poor start to finish with figures of 3-35 from his four overs.
He began with a wide and conceded 21 in two overs as Durham raced to 53-0 in the sixth over.
Then openers Mark Stoneman (33) and Phil Mustard (19) fell in successive deliveries, Stoneman to a run out and Mustard caught behind off Glen Chapple (2-22) and the run chase stalled.
McClenaghan returned and was immediately driven over long-on for six by Ben Stokes.
At that point Durham needed 41 off 23 balls but McClenaghan derailed them with three wickets, including that of Stokes after he made 34 off 26 balls.
Stephen Moore had earlier set the game up for Lancashire with a 58-ball 75 at the top of the order after the visitors were invited to bat.
Moore hit eight fours and a six and received good support from Ashwell Prince (32) in an opening stand of 77 in 10.3 overs.
Veteran Australian Simon Katich added some late impetus with three sixes in his 25-ball 43 not out, adding 66 from 43 deliveries for the third wicket with Moore, who was run out by Stokes in the final over.