Britain's Jamie Murray reached Sunday's mixed doubles final with partner Jelena Jankovic after winning their second match of the day on Saturday.
They won 6-4 4-6 6-4 against 11th seeds Daniel Nestor and Elena Likhovtseva in a late-evening Centre Court semi-final.
Murray and Jankovic had earlier beaten ninth seeds Marcin Matkowski and Cara Black 7-6 (7-1) 6-7 (4-7) 7-5.
In the final they face Jonas Bjorkman and Alicia Molik, who won their semi-final early on Sunday.
The final is the second match on Centre Court, following the men's singles final.
The British-Serbian pair had to call on all their reserves of energy against Nestor and Likhovtseva, who earlier beat British duo Alex Bogdanovic and Melanie South 6-3 7-6 (7-4), after their marathon quarter-final victory.
"We're delighted to be in the final. A Wimbledon final is a Wimbledon final. We'll be going out to win and, if we do, then it's great"
Murray and Jankovic needed two hours, 32 minutes to overcome Matkowski and Black on a packed Court Three. They wasted five match points in a match which only featured three breaks of serve.
Murray needed an injury time-out during the second set when he had strapping put on his right foot but overcame the problem to earn victory.
And then he and Jankovic, who reached the fourth round of the women's singles, delighted the Centre Court crowd with their bonus appearance.
They took the first set and did not concede a break point until the 10th game of the second set - and that allowed their opponents to level the match.
But they forced breaks from both opponents in the decider to secure their place on the final day of the Championships.
Murray will now hope to become the first British title winner at Wimbledon since 1987 when Jeremy Bates and Jo Durie won the mixed doubles.
"When I got to Wimbledon on the first Monday, I didn't expect that I'd be playing a match on Centre Court on Sunday, especially in mixed doubles," admitted Murray.
"We're delighted to be in the final. A Wimbledon final is a Wimbledon final. We'll be going out to win and, if we do, then it's great."
Murray insisted that the carefree attitude which played a crucial role in their semi-final victory would be carried over into the final.
"I think so because it's not so intense," he said. "We never get to play mixed doubles. It's not like our career or anything like that.
"We'll obviously want to win but I'm sure we'll do the same as we've done in all the other matches."
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