The striker came off the bench after an hour and scored late equalisers in both regulation and extra-time to peg back the Tannadice side to 2-2 after 120 minutes, then went on to score the winner in a 3-2 shoot-out victory.

Jean-Claude Darcheville hit the woodwork with Rangers' first penalty, but Craig Conway then hit the post before McGregor made crucial saves from David Robertson and Lee Wilkie to secure Rangers' first trophy in three years.

The goalkeeper said: "It's an unbelievable achievement - all the boys have dug in so much it's untrue and our team spirit has been unbelievable - and that's what's come through in the end.

"All through the game, I thought, 'it's not going to happen,' so to win on penalties was brilliant.

"I was feeling all right during the shoot-out and felt I could save a couple and luckily I did.

"Boydy hasn't been a regular player but he came in and I honestly think he won it for us - he's been brilliant and he's a good friend so I'm just really pleased for him personally."

With the first silverware of the season already in the Ibrox trophy cabinet, Rangers continue to fight for glory on a further three fronts, namely the Clydesdale Bank Premier League, Scottish Cup and UEFA Cup.

McGregor insists the Ibrox side will not become carried away with the prospect of further victories.

The goalkeeper gave a stunning show on Thursday by repeatedly defying Werder Bremen to book his side's place in the last eight of the European competition.

With George Burley due to name his first Scotland squad tomorrow, McGregor says his personal ambitions remain modest.

He explained: "I'm not thinking about the treble; the most important thing for me is Rangers, and we just want to win every game we play in and will take things from there.

"For me, if the Scotland thing happens, it happens - Craig [Gordon] has established himself as number one, he's a very good goalkeeper and has been there for a number of years so it will be hard to move him.

"It doesn't matter how well you're doing, as he's number one just now, but I'm just happy to play away at this club and the most important thing to me is to win things with Rangers."