Southampton booked their place in the EFL Cup final after beating Liverpool 2-0 over two legs
Shane Long's added time winner at Anfield gave them a 1-0 win on the night and 2-0 victory aggregate win over Liverpool to clinch their Wembley place on February 26.
And it means a repeat of the 1976 FA Cup final is on the cards if Manchester United with a 2-0 first leg lead – finish the job in their semi-final at Hull tonight.
But Southampton goalkeeper Forster admitted he was a relieved man after just managing to claw the ball out from the goal-line after fumbling an Emre Can shot early in the second half.
He said: "No, I didn't think it was over. The footballing gods were with me tonight so that was the bit of luck we needed.
Fraser Forster made a phenomenal save during the EFL Cup clash at Anfield
"I've probably been missing a bit of luck this season but luckily it didn't go in and we'll take that and see what happens in the final.
"We felt we deserved it over two legs. We created a lot of chances in the first leg and we limited them tonight. Anfield's always a tough place to come but it was a great performance and we got the job done and now we look forward to the final."
The 1976 FA Cup final stands as Southampton's only major trophy in their 131 year history and but skipper Steve Davis hopes to emulate Lawrie McMenemy's heroes from 41 years ago.
He said: "It's going to be great. We've got the opportunity to make a little bit of history. We're obviously going to go there to enjoy the occasion and the only way to do that is to win it. So we will look forward to it.
Shane Long scored at Anfield to ensure Southampton beat Liverpool over two legs
"We could have done with that goal from Shane earlier but that was the story of the two legs really. In the first leg we could have given ourselves more of an advantage. And in the first half tonight I missed a chance and Dusan [Tadic] had a chance as well.
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"But the longer the game goes on with Shane¹s pace you know you are going to get an opportunity. Jack Sims did very well in the build-up and Shane tucked it away to secure it for us."
Saints boss Claude Puel, who stretched his unbeaten run against Liverpool as a manager to five games, said: "It was fantastic. Over the two legs we deserved it."
The defeat continued Liverpool's woes since the turn of the year.
They have only once in seven games in all competitions in January and the goals have dried up – they have managed only six in those seven games.
Liverpool player ratings against Southampton in EFL Cup semi-final second leg
Wed, January 25, 2017
Express Sport brings you Liverpool's player ratings from their EFL Cup semi-final second leg against Southampton
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Loris Karius – 6.6
Dismayed boss Jurgen Klopp agreed Southampton's were worthy winners.
Klopp said: "They won both games, they deserved it. We did really well, we cannot create more chances than we did in the second half, we were dominant. It is difficult because you have to take risks but too many risks plays to their strengths.
"We had big chances and no luck. A lucky save, a good save but a lucky save. The ref didn't see the handball of Long and it doesn't help in a game like this.
"We had seven good chances. You have to score, and we didn't do so we lost. I'm fine with the performance but not the result.
"If we could hear a referee's whistle it would be nice. I don't know how many times that has happened this season. Against Manchester United we had a clear offside goal [Zlatan Ibrahimovic], nobody says anything. Tonight a penalty, nobody says anything."