Watford hero Gerard Deulofeu vowed to fight Manchester City for the FA Cup after his stunning match-winning cameo downed Wolves.
The 25-year-old's brilliant brace capped the Hornets' fightback as they recovered from 2-0 down with 11 minutes remaining to win a thrilling semi-final 3-2 after extra time.
Troy Deeney's injury-time penalty made it 2-2 at the death before Deulofeu's 104th-minute winner at Wembley on Sunday.
The former Barcelona forward came on in the 66th minute to turn the game before going off with an ankle injury with eight minutes left.
City, who are chasing the quadruple, will be overwhelming favourites next month but Deulofeu - who scored an audacious chip to start Watford's comeback - is not ready to roll over.
He said: "They are favourites but we know what we have to do, it's going to be a tough game but we are going to fight for the title. The final is a final, anything can happen.
"It was a great afternoon and when I came on we changed more to attack. We got the first one and the feeling was we could get the second.
"In extra time my feeling was we were going to kill the game."
Hornets manager Javi Gracia revealed Deulofeu was angry at starting on the bench.
And after sending Watford to their first FA Cup final since 1984 the Spain international admitted he was not happy initially.
He said: "He knows I'm angry because I've been playing all season but sometimes the manager has to decide. He decides this and what I have to do is what I did.
"Coming from teams like Barca and Milan, they play a different style than Watford and I have to adapt to the characteristics. That's what I did. It's difficult but it's what I have to do to make a good season.
"I don't think it (his first) is the best goal I've scored, if it is then I have to improve. It's one of the most important ones."