Jonny Marray and Roger Federer do not have much in common besides being able to call themselves reigning Wimbledon champions - one of them having earned more than a hundred times more prize-money than the other from tennis.
Yet as relative prince and pauper they got similar receptions as they entered the O2 Arena on Tuesday, Federer acknowledging the crowd with his usual regal wave while Britain's unlikely doubles hero raised his hand in somewhat self-conscious fashion.
Out of the shadows: Jonny Marray and Frederik Nielsen (left) enter the O2 Arena on Tuesday
Marray is still not used to this sort of thing, certainly not in the manner of his near namesake Andy Murray, who on Wednesday afternoon takes on Novak Djokovic in the pivotal match of Group A at the Barclays ATP World Tour Finals.
The 31-year-old from Sheffield is far from one of life's natural attention grabbers, yet as the warm-up act in the afternoon session with Danish partner Frederik Nielsen, he did just about everything he could to steal the scene from Federer.
Having recovered from 5-1 down in the deciding 'Super' tiebreak, Marray saved a match point with a badminton-style overhead at 9-10 that set his pairing up to win 6-4, 6-7, 12-10 against the more fancied Indian team of Mahesh Bhupathi and Rohan Bopanna.
Centre of attention: Marray and Frederik Nielsen celebrate their victory on Tuesday
Even the most diehard Federer fan will have admitted that it turned out to be a slightly more pulsating contest than their man's 6-3, 6-1 destruction of the bewildered Janko Tipsarevic.
Federer looked every inch the player whose on-court career earnings total £47million, a sum you could more than quadruple to find his overall worth. He has given early notice that he will not be surrendering his title easily.
As for Marray and Nielsen, playing their last tournament together before the Dane concentrates on his singles career back at Challenger circuit level, they are happy trying to drink it all in, for the reason that Nielsen stated: 'When I'm playing my singles tournament that nobody gives a rat's a**e about, I'm sure it's going to be back to reality.'
Roger that: Federer cruised to victory over Tipsarevic at the O2 Arena
His English partner knows too well that level of the sport, and has been enjoying his five-star hotel on the river and the private boat transportation down the Thames.
His contrasting experiences include playing a low-tier event in small town Uzbekistan in 2005, when the army brutally suppressed anti-government protests.
'We were staying in flats of local residents, and there was an uprising. 'It was a six-hour drive from the capital Tashkent and the British Embassy had to come in and drive us out in an armed convoy. It's all character - building stuff, isn't it?'
Double team: The pair are playing their last tournament together before Nielsen focuses on his singles career
Order of play on Wednesday
Doubles: R Lindstedt (Swe) & H Tecau (Rou) v M Bhupathi & R Bopanna (Ind).
Singles: N Djokovic (Ser) v A Murray (GB).
Doubles: M Mirnyi (Blr) & D Nestor (Can) v J Marray (GB) & F Nielsen (Den).
Singles: T Berdych (Cz) v J Tsonga (F).
Marray's form dipped in the wake of Wimbledon but he played well enough yesterday for his pair to have won in straight sets rather than being pushed to the brink.
Still without a partner for next season, he has actually advertised for someone on the ATP website and sees himself as being in the shop window.
'It's not bearing fruit yet, but if I do well here I might become more attractive,' he said. Nothing that has happened in the opening salvoes of this event suggests that the winner will come from anywhere else than the triumvirate of Murray, Djokovic and Federer.
On yesterday's evidence the Swiss is going to win his group, so there is a big incentive for the other two to finish top of theirs and avoid him in the semi-finals.
It will be the sixth meeting of Murray and Djokovic this year and the last three have been colossal scraps, starting with that tense Olympic semi-final at Wimbledon, which finished in near darkness and a 7-5, 7-5 win for the British No 1.
'That was a big match for me,' said Murray. 'I knew how much the top players wanted to do well at the Olympics and how much it meant, so to beat him was big.'
That set Murray up for the epic five-setter in the US Open final, and he could have been going into today with three straight wins over his longtime rival had he taken one of five match points in their Shanghai final last month.
The indoor conditions are probably more to his liking today so, regardless of the rankings, the 25-year-old Scot will start as marginal favourite.