Swansea boss Michael Laudrup warned his players they still face a "mountain to climb" despite shocking Chelsea 2-0 in the first leg of their Capital One Cup semi-final at Stamford Bridge.
A pair of Branislav Ivanovic mistakes ensured the Swans got full reward for a battling performance at the home of the European champions. Michu swooped on Ivanovic's initial error in the first half before Danny Graham gave the Welsh club a near-decisive lead in injury-time.
Laudrup said the performance was one of the best since he took charge in the summer, but warned his side could ill afford to begin thinking about a Wembley final.
"To be honest I'm delighted with the result,'' he said in an interview on Sky Sports. "I would lie otherwise. I think we have had some historic results already this season - winning at Anfield and at the Emirates. Winning at the European champions, though, is something very special.
"But there is still a mountain to climb. They have so much quality and we will have to play exactly the same, with the same intensity. They could still score three of four goals against us - but I am most happy about going into the second leg at home with a possibility to play a final at Wembley."
Laudrup offered most praise for his side's defence, who restricted Chelsea's chances despite conceding the majority of possession.
"I think we knew it would be a difficult game," he said. "The possession they had was much more than us - that's obvious - but to be honest they only had three big chances.
"They gave us two goals, but you have to score them. They are two mistakes but even if you take away the two goals they only created three chances. It was a marvellous fight."
Defender Ashley Williams said the return leg in a fortnight would be one of the biggest occasions in the club's history.
"It will be a massive game. We're only half-way their in a massive tie," he said. "If we do get to Wembley it will be massive for everyone. We just wanted to get a result and bring them back top our place and try and finish the job.
"Tonight we just wanted to play our own game and not let the occasion get to us. We stayed calm and played the way we wanted to."
Michu added: "The key was that the whole team worked very hard. I'm very happy for the team."
Information from the Press Association was used in this report