"Colin doesn't enjoy serving first, he's quite against it," says regular partner Ross Hutchins on BBC Three. The British pair get their wires crossed and leave a big gap for Bob Bryan to drop in a return on the first point, but Fleming recovers to get on the board.

The Bryans go for the 'I' formation and an ace seals a love hold in quick time. They jog back to the chair, the brass band wails and Courier chats. A good start for the Americans.

Not the greatest of starts from Inglot, who opens with two double faults and then sticks a smash in the net. Three break points.... a big serve and a second-serve ace suggest the Londoner can dig himself out of trouble, but a good return sees him volley into the net.

Inglot nicks one at the net but the Americans kick off with a solid hold and there's already been more whooping and hollering from the stands than yesterday.

I thought for a moment someone in the crowd had a giant cardboard cut-out of Stuart Pearce, but it turns out it's Jim Courier. It was at a bit of an angle. Bob Bryan to serve....

Image source, Getty Images

On the face of it, Inglot and Fleming are up against it. The Bryan brothers have topped the world rankings for nine of the last 11 years and only last year they completed a 'Golden Bryan Slam' as they followed up gold at London 2012 with four successive Grand Slam titles. In the Davis Cup, they have been beaten just four times in 11 years, but..... intriguingly, the Bryans lost both their Davis Cup rubbers in 2013, against Brazil and Serbia. Can Britain inflict an unwanted hat-trick on the American stars?

Dom Inglot is drafted in to play his first Davis Cup rubber, something he had been desperately hoping for when discussing the prospect during the Australian Open last month. The 6ft 5in 27-year-old Londoner is known as Dom 'The Bomb' because of his mighty serve and, with regular partner Treat Huey of the Philippines, has risen to 27 in the world rankings.

He will team up with Scotsman Fleming for the first time as seniors, although the pair regularly train together along with the other British doubles players and will know each other's games well. And in Fleming, the new boy has a partner who has lost just one of his nine Davis Cup doubles rubbers over five years.

Image source, Getty Images

So, 24 hours on from James Ward and Andy Murray in the singles, where do Friday's heroics leave Great Britain? Well, they are within a point of their first victory over the United States since 1935, and their first World Group win since Spain were put to the sword in the tennis hotbed of Telford in 1986. Rivalling the team that Fred Perry (pictured left on a training run with the team at Beachy Head) led to four straight titles in the 1930s might be a bit much to ask, but a quarter-final against Argentina or Italy in April will do very nicely for now.

Captain Courier is sticking with the formal attire and just strode onto court in his grey suit, with similarly sober tie today, while the Bryan brothers jogged on and Andy Murray strolled. The sun is out over Petco Park and Courier shares a joke with opposite number Leon Smith before the anthems get a run out, and there are plenty of union flags fluttering in the stands.

Image source, Getty Images

Who would have thought it? Great Britain head into day two of a World Group tie, away to the United States, in such command that they can rest their big hitter. With two points secured and only one more required, Andy Murray has been pulled out of the doubles to rest up ahead of Sunday's singles clash with Sam Querrey. Into his place steps Davis Cup debutant Dom Inglot, the form Briton in doubles over the last year, to team up with Colin Fleming. In their way - the chest-bumping, title-hording, world number one pairing of Bob and Mike Bryan.