In Brussels, Argentina’s world number 39 Leonardo Mayer beat Steve Darcis 7-6 (7/5), 7-6 (7/1), 4-6, 6-3 after David Goffin, the world number 15, had seen off Federico Delbonis 7-5, 7-6 (7/3) 6-3 to give Belgium the lead.
The doubles is due to be between the Belgian pairing of Ruben Bemelmans and Kimmer Coppejans and the Argentina duo of Carlos Berlocq and Diego Schwartzman.
Belgium will host Britain in the final from November 27-29 in a repeat of their 1904 final when the Britons won 5-0 at Wimbledon.
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.
Goffin echoed Mayer’s team-first attitude, and did not shy away from Belgium’s historic final bid – the last time they were in the tournament’s decider, the competition involved only three nations.
“My opponent left nothing out there”, said Goffin after his win over Delbonis. “I fight and I fight and this time I had the win”, Darcis said. The nation will look to exact revenge against the Brits after Andy Murray led them past Australia 3-2 on Sunday.
Belgium have made the most of a good World Group draw this year.
Roger Federer and Stan Wawrinka are among the sport’s leading names taking part in those.
“He moves so fast on the court — he’s like a ghost”, said Huta Galung of Federer. My back has been giving me a lot of trouble this week.
Murray’s only moment of alarm on Sunday came in the first set when Tomic briefly raised his level, breaking back from 2-5 down to level the set at 5-5. His previous defeat – also with Bopanna – was against Uzbekistan in 2012.
So Argentina still have never won the coveted Davis Cup, but it is rather hard with only one player up to the standard of the opposition as in this case.
The 17-times Grand Slam champion, beaten by Novak Djokovic in the US Open final a week ago, recovered after losing Saturday’s doubles with Marco Chiudinelli to give the Swiss a decisive 3-1 lead and secure their World Group spot.