Andy Murray has the second of three wins he’s looking for in Ghent. Mal Taam/MALT Photo

FROM THE DAVIS CUP FINAL IN GHENT, BELGIUM – By all economic logic, doubles as a spectator sport ought to be dead by now. The gulf between public interest in singles and doubles seems to grow each year, and the ATP has only saved the doubles circuit by a change in the scoring system that effectively limits the length of matches.

And yet the corpse continues to breathe, especially in Davis Cup where the doubles can still be pivotal, despite making up just 20 percent of a weekend’s action. The doubles in this final was a case in point, not just pivotal, but a very watchable match. Great Britain’s Andy and Jamie Murray’s 6-4, 4-6, 6-3, 6-2 victory over Belgium’s Steve Darcis and David Goffin is unlikely to be memorable as a great contest, but it was a fascinating tactical encounter which had some great points, and the result makes it hard to see anything other than the British claiming a tenth Davis Cup title on Sunday.

And yet there was something unsatisfying about it. The weakest link among the four was, by some way, Jamie Murray. He looked almost out of his depth at times, and his kid brother had to bail him out on numerous occasions. Darcis and Goffin, playing together for just the fifth time (including two Challengers), targeted the left-handed Murray, and allowed him no confidence on his returns, many of which he lobbed more in hope than expectation.

Eventually Jamie woke up, most noticeably after dropping serve early in the third set, and by the end his volleys were sharp. But his serve was always shaky, and Andy was the only member of the quartet not to be broken.

And yet, if one looks at the doubles rankings, Jamie is seventh, while Andy is at 180, Goffin at 378, and Darcis 596. And the reason Andy, Goffin and Darcis played when higher-ranked doubles players were available is that they are better players – they just don’t play enough doubles to have better rankings. In effect, when it comes to Davis Cup, singles rankings generally are a better guide to doubles prowess than doubles rankings.

That is not to knock doubles on the tour. The doubles competition at the recent ATP World Tour finals produced some great matches and human interest stories, capped by a 34-year-old from the Caribbean, Jean-Julien Rojer, reaching the top of his profession having grown up with self-taught strokes in Curacao, Netherlands Antilles, with very little help until the Grand Slam Development Fund picked him up at 13. Tour doubles has clearly found its niche, serving a useful purpose as a sub-tour to the singles stars.

But Davis Cup regularly shows that a top-100 singles player generally trumps a doubles specialist. Goffin and Darcis were Belgium’s best option, and with Darcis holding the pair together with some delightful touches at the net, Belgium could easily have won until Darcis faded badly in the fourth set. But a tactical adjustment initiated by Andy proved the Belgians’ undoing.

The Murrays took the first set, but the match seemed to turn when Jamie was broken in the third game of the second. With the Belgians targeting Jamie, Andy had to take a lot of risks to cover for his brother. When Jamie was broken at the start of the third set, the Belgians looked the likelier winners, but at that point Andy started staying back while Jamie was returning, thereby giving his brother a bigger target to aim for and making it harder for the Belgian at the net to hit volley winners.

Combined with the Belgians’ failure to come in after their serves, the effect proved dramatic. It allowed Jamie to push his returns and charge in to the net. As his reflex volleys found their range alongside Andy’s cultured volleys, the visitors wrested the initiative from the hosts, and turned the match back in their favour. There was a flurry of breaks: Jamie, Darcis, Goffin, Jamie again and Darcis again, but thanks to Andy’s service holds the British took the third set.

With Darcis broken in the third game of the fourth, and tiring badly, Jamie’s confidence grew, and he was a more convincing player at the end as the Murrays ran out winners in two hours, 49 minutes. Andy paid tribute to his brother at the end, saying, “I trust Jamie on a doubles court so much, and even if he started slow, I knew he would get it going. He loves playing in big matches. He tends to perform very well on big occasions, and this year in all of the ties, he’s performed extremely well. I trust him when he’s next to me on the court, not just because he’s my brother but because he’s an exceptionally good tennis player.”

Sunday’s singles key is Murray vs. Goffin

Nice words, and no doubt heartfelt to a brother and teammate. Nonetheless, the match strengthens the impression that the British team is Andy Murray plus a couple of helpers, and Murray is likely to seal victory for Great Britain – and make it 11 wins out of 11 for him in Davis Cup this year – when he takes on David Goffin in Sunday’s first reverse singles.

That match is not a foregone conclusion. Goffin can afford to be more relaxed than he was against Kyle Edmund in Friday’s singles, and while he has never taken a set off Murray in two previous meetings, they have yet to play on clay, which is Goffin’s best surface. But Belgium’s problems appear to go beyond the unlikelihood of Goffin beating Murray. Darcis admitted to tiring in the fourth set of the doubles, and while he said he’d be available for a fifth rubber if necessary, he looks out of the running having used up his reserves in the doubles.

Inadvertently, this doubles may have acted as an advertisement for next year’s Olympic doubles tournament. The allure of Olympic medals means the best singles players are often willing to turn out for doubles in the Olympics, indeed it has been known for players to default from the singles if they feel they have a better chance of a medal in doubles. The theory that the Olympics have the best doubles tournament in today’s tennis – because so many top singles players turn out – appears to have been boosted by Saturday’s action at this Davis Cup final.