PERHAPS it can be put down to his impending fatherhood but Andy Murray's thoughts are increasingly turning to the legacy he will bequeath to the next generation. It is the morning after the night before and the triumphant Great Britain team are sitting in a plush hotel near Ghent's historic centre. Downstairs at reception, Andy and Jamie's dad Willie is quietly checking out; Leon Smith's wife and three young children are here somewhere too. The feel is intimate and cosy after a night of celebration which in the main was spent in the company of family and close friends, with phones switched off.

The Lawn Tennis Association (LTA) are present too, but if the sport's governing body in this country were hoping for a few days' grace to revel in Britain being able to call themselves world champions they can think again. Instead, a few home truths were being delivered in their direction, and by extension their branch office north of the border, Tennis Scotland.

The imperative is that the governing body act immediately or risk squandering their once-in-a-lifetime chance to use the ongoing British success story in the sport to safeguard it's future. For his part, the world's second best player is particularly dismayed by the ludicrous situation whereby the state-of-the-art £40million National Tennis Centre at Roehampton lies empty most of the time. He is reluctant to spent too much time discussing sport's next steps with LTA chief executive Michael Downey as so little tends to come from such chats that it is usually time wasted.

"I hope so but they need to act on it now," said Murray, when asked if Britain's success could be a bigger catalyst for change than his Wimbledon win in 2013. "It’s no use doing it in 18 months. It should have started before today but if it was to start then I think it’s time to make some positive changes so that things get better.

"I went to the National Centre to practise for a couple of days after Shanghai," he added. "I was there on a Monday at like 3 o’clock and then on Tuesday at the same time. And there was not one person using any of the indoor courts and not one person in the gym. I took photos of it because the place cost like £40 million and there are no people. It doesn’t necessarily have to be performance players, but there was just nothing going on in there at all. It’s such a shame.

"I spoke to Michael once before the tie in Glasgow – I think it was in February, before we played against the States. But I don’t have loads of time to talk about stuff and I don’t really know what to say. It’s almost sometimes like I feel a bit like you are wasting time because nothing ever gets done so I also don’t want to waste my time talking about stuff."

Performance is just one strand of the problem, participation another. But the Roehampton situation is perhaps a prime indication of the paralysis by analysis which seems to afflict key decision-makers in British tennis. At first, convinced our young tennis stars were too spoiled and cosseted, Downey and previous performance director Bob Brett decided to evict them from the facility. This was all very well, apart from the fact that young players now get no chance to spend time with senior pros, and senior pros such as James Ward and Kyle Edmund can't find a decent hitting partner to play with. With the exception of Katie Swan - and possibly Scotland's Ali Collins, Aidan McHugh and Ewen Lumsden - there isn't much coming through.

"We went to the US Open the last two years and there has not been one boy playing," says Jamie. "I don’t know where the next generation are," says Andy. "I feel like I am saying ‘I don’t know’ a lot but I genuinely don’t."

"There’s so much change," admits Smith, perhaps the man blessed with most insider knowledge. His own position remains unclear until the world hears what interim performance director Peter Keen, formerly of British Cycling, has to say. "Every time you change, you have to start again. When we had a squad at the NTC, there was something that you could attach younger players to and there was at least an environment which people could drop in to, whether it was these guys or anyone else or guys between 200 and 500 who hit the ball well and could spar with everybody.

"It was the decision of Michael and Bob to move that nucleus on," he added. "We’ve now got another performance director who will have to unfold another strategy. Kyle was probably the last person to be coached by an LTA employee. I don’t know the figures, but over the last eight years I would guess £25m has gone into junior programmes. Maybe it is spread too thinly. But it’s not worked, because there are no juniors."

As for Tennis Scotland, Jamie Murray's frustrations with the system are well known. Let's just say that attracting someone with the caliber of Smith to spent more days here pulling all the coaching work together would represent a giant leap forward. "I would live in Scotland if I could do it from Scotland," said Jamie. "Whether there are the right initiatives in place, I don’t know. But I have said it a million times, it is a shame that Andy has done such amazing things in his career and for tennis in this country and of course we have just won the Davis Cup. We have the opportunity to make tennis really popular in this country."

So impassioned was all of this that you had to remind yourselves that by rights the team should have still been wallowing in Britain's first Davis Cup win for 79 years. The team will go for a slap-up meal in Nobu tonight to mark the milestone, but which member of the group let his hair down the most? "Dan Evans, probably," said Andy. "Enough said," interjected Smith.

Considering how much it takes to align for a success like this, the comparison as the fireworks went off in the Flanders Expo Arena was with the end of Ocean's Eleven, when the main participants go their separate ways after their successful heist. While Smith admits it will be "hard to replicate" this year's achievement, assuming the right measure are put in place, Andy isn't so sure. "I don't know," he said. "Ocean's Twelve was pretty good. And Ocean's Thirteen."