|NatWest T20 Blast, Emirates Old Trafford|
|Lancashire Lightning 137-8 (20 overs) beat Glamorgan 136-7 (20 overs) by one run|
Jordan Clark took four wickets, including a triple-wicket maiden, to bowl Lancashire to the T20 Blast finals day with a one-run win over Glamorgan.
Chasing 138 to win, Glamorgan were going well at 92-2 before seamer Clark (4-22) struck to reduce them to 100-6.
Jacques Rudolph's unbeaten 67 kept Glamorgan in it but with six to win off the last ball Andrew Salter could only hit a four as they fell short on 136-7.
Usman Khawaja had earlier top-scored with 67 in Lancashire's 137-8.
Victory for Lancashire, who were without Pakistan paceman Junaid Khan because of international commitments and former England all-rounder Andrew Flintoff because of a calf strain, means they are back at finals day following a three-year absence.
After Friday's scheduled tie was abandoned because of heavy rain in Manchester, play finally got underway at 15:15 BST, 75 minutes later than initially hoped.
|Lancashire at finals day|
|Lancashire have never won the domestic Twenty20 title.|
|They were beaten finalists in 2005, losing to Somerset.|
|They also reached finals day in 2004, 2007 and 2011.|
Glamorgan put Lancashire, who had lost just twice in the group stages to top the North Group, into bat and were soon rewarded by Graham Wagg (3-28) bowling Ashwell Prince leg stump and having Tom Smith caught behind by wicketkeeper Mark Wallace to leave the Red Rose 19-2.
And although Khawaja shared partnerships of 40 for the third wicket with Karl Brown and 54 for the fifth with Steven Croft, Lancashire struggled to score quickly, with their progress further checked by three late wickets for Michael Hogan (3-33).
Glamorgan's reply was held up by rain after seven balls, and although Smith had Wallace caught behind five balls after the resumption, Jim Allenby's rapid 38 off 30 balls seemingly put his side in charge.
But after the experienced Murray Goodwin was bowled to become Clark's first victim, Rudolph could only watch from the other end as the 23-year-old proceeded to take three more wickets in his following over as Glamorgan slumped from 92-2 to 100-6.
He bowled Chris Cooke with the first ball of the 16th over, then bowled Stewart Walters two balls later before having David Lloyd caught at slip by Smith third ball to record his best Twenty20 figures.
Rain immediately returned but once they resumed, with Glamorgan needing 38 to win off 24 balls, Wayne White soon took a steepling catch off Kyle Jarvis to remove Wagg.
Veteran South African Rudolph, whose runs came off 49 balls despite suffering a shoulder injury fielding, brought the equation down to 15 required off the final over.
But Clark held his nerve as Salter, left needing to hit a maximum off the last ball to win the game, could only squeeze it down to third man for a boundary as Lancashire got home by the narrowest of margins.
Lancashire's match-winner Jordan Clark: "A win in the quarter-final getting us through to finals day, I couldn't ask for anything more really.
"It was just kind of going back to basics and trying to hit the top of off stump. Restricting them to five an over wasn't going to win us the game. We needed wickets.
"Sometimes it's your day, and it was mine with the ball. When the opportunity comes, you've just got to take it."
Glamorgan captain Jim Allenby: "Firstly, full credit to Lancashire and the ground staff. They did an amazing job with the rain that's fallen to get us out there.
"To lose by one run is a shame, especially when we were going so well there at one point.
"Lancashire are a good side who never give up and came through with the win. We're disappointed because we could have won that game, but sometimes you've got to credit the opposition."