Murray mania returned to Wimbledon as fans braved morning downpours to see the Scot try to take double gold for Team GB.
The 25-year-old will take on Roger Federer in the singles final, before teaming up with Laura Robson in the mixed doubles final.
Andy Murray's return to centre court comes just weeks after his heartbreaking loss to the Swiss player in the Wimbledon final.
Andy Murray throwing his racket on the ground after losing a point as he and Laura Robson played a mixed doubles semifinal round match against Sabine Lisicki and Christopher Kas of Germany at Wimbledon on Saturday
Rain hit SW19 this morning, and the now well-used centre court roof was on for the first match of the day - the women's doubles finals between the Williams sisters and Czech pair Lucie Hradecka and Andrea Hlavackova.
But the rain did not deter supporters - even those without tickets to the dry haven of centre court were gathered on Murray Mount ready to watch Britain's bid for more gold medals after last night's fantastic performance.
Natalie and Mike Rothwell, from Southport, are staying in London for the whole of the Olympics with children Oliver, 15, and seven-year-old Ellie.
Decorated with their Union Jack flag, they braved the downpour this morning.
"We got here at about 11.30am, we've got ourselves a good seat to watch Murray," 35-year-old Mrs Rothwell said.
"It's a shame about the rain but we don't really mind. It's just so exciting. We've watched a few events but we haven't actually seen someone take gold live, so it will be amazing if Murray does that."
Husband Mike, 38, added: "We watched the whole of Wimbledon, we just about got over that and now we're here, watching him play Federer again."
Murray can expect the same high levels of support in his match today that he experienced during Wimbledon, as well as his Olympic campaign.
He has said he will place equal importance on both his Olympic finals today as he goes for double gold.
"For me, both matches are very important. I'd love to win two golds, and I'd obviously prefer one gold to two silvers. It's very different preparation to what I'm used to and that's the beauty of this competition.
"Winning a mixed doubles title at Wimbledon would be great but winning the singles title is obviously much, much bigger, whereas here it counts for exactly the same in the medal table.
"I'd obviously love to beat Roger tomorrow as well but either match would be great to win and I'll give it my best in both."
The match is likely to bring a sense of deja vu to Murray, who broke down in tears in a rare show of emotion after losing out on his historic Wimbledon title bid last month.
The Scot - the first Briton to make it to the men's singles final in 74 years - was hoping to become the first male champion since Fred Perry in 1936.
But he was beaten in an electric final by Roger Federer, who won the match 4-6 7-5 6-3 6-4 - equalling Pete Sampras's record of seven Wimbledon titles.
It brought the Swiss player to a total of 17 grand slams, and restored his world number one ranking.
Murray, 25, was reduced to tears as he thanked his family and the crowd, who roared and applauded throughout the match.
He said: "Tactically, I was pretty good in that final. I had my opportunities in the second set. I went for my shots on those chances, I just maybe didn't make the best shot selection.
"So there's some things I'll try to do a bit differently. But I did play very well in that final. I didn't play a bad match. Roger played some great tennis.
"I think he played great when we went under the roof. That was the difference. I played at a high level throughout. He just raised his level in the middle of the third set."
The worst Murray can come away with today is two silver medals, while at 18 Robson will be the youngest Olympic tennis medallist since Jennifer Capriati won singles gold in Barcelona in 1992 aged 16.
Murray will look to follow in the footsteps of his brother Jamie, the Wimbledon mixed champion with Jelena Jankovic in 2007, in winning a mixed doubles title on Centre Court.
In the mixed doubles final, which will take place after Murray's singles final, he and Robson will face top seeds Max Mirnyi and Victoria Azarenka of Belarus.