The 28-year-old, who became the first Briton to win the Wimbledon men’s singles in 77 years in 2013, duly delivered his third point of the match, beating an increasingly dispirited Tomic 7-5 6-3 6-2 to wild cheers from a partisan Glasgow crowd.
Murray, who won both of his singles matches and joined elder brother Jamie to claim an epic double clash on Saturday, has already led Britain further than any player in his lifetime.
The Argentines also need one more point from Sunday’s reverse singles to reach their fifth Davis Cup final after finishing runner-up four times.
Belgium last reached the final of the Davis Cup in 1904 – which was the first ever Davis Cup – where they lost to the British Isles. Should they do so they will play host to either Great Britain or Australia in November.
“For our small country it’s pretty good. For me it’s really big”.
“I think whoever won the doubles was the [Davis Cup] victor “, he said. We say narrowly because it was very close in the matches this columnist saw, many games went to deuce and five of the sets had to be decided by tie breaks.
The Americans will be back in the World Group for the 27th year in a row after Jack Sock, playing on his first Davis Cup team, beat Denis Istomin of Uzbekistan 6-2, 2-6, 6-4, 6-4 in Tashkent.
Belgium’s David Goffin reacts after winning a point during the first singles?match of the Davis Cup World Group semifinal against Argentina’s Federico Delbonis in Brussels, Friday, September 18, 2015. “This match, it’s the match of a lifetime”, added Darcis.
Darcis saved another match point in the final tiebreak with a forehand down the line but sent a return long on the next one on Berlocq’s serve.
He then showed a greater comfort level on the medium-speed hard court in the final set to separate himself from his opponent, wrapping up the contest in just over two and a half hours.
Mayer, ranked 39, had played almost eight hours of tennis on Friday and Saturday and visiting captain Daniel Orsanic opted to play 68th-ranked Schwartzman instead.