After the drama of Friday's opening singles contests, the doubles matches were a lot more straightforward with John Peers and Jordan Thompson teaming up for Australia to beat Rubens Bemelmans and Arthur de Greef 6-3 6-4 6-0.
Frenchmen Pierre-Hugues Herbert and Nicolas Mahut beat Filip Krajinovic and Nenad Zimonjic 6-1, 6-2, 7-6 at Pierre Mauroy Stadium.
France is bidding for a first Davis Cup title since 2001, having lost three finals since with the most recent a defeat by Roger Federer's Switzerland in 2014.
'It was surprising. Davis Cup doubles you usually see marathon five-setters, ' Thompson said. "It's never easy to serve for the match, I felt weaker at the worst time".
"They did not count their hours to put me back on my feet", he said.
In Sunday's first reverse singles, Tsonga can clinch the tie for France with victory over Lajovic. 'This victory is also theirs'.
"We came out really strong and sustained it from the start and was able to stay on top of it".
Belgian's medical team have been working round the clock to ensure Goffin's presence after the Belgian star injured his left knee at the US Open.
"We got a break early in each set and that kept the crowd out of it".
"We need one out of two matches tomorrow", said Australian captain Lleyton Hewitt.
Victory for Nick Kyrgios or John Millman in either Sunday's singles rubber will be enough to secure a decider on home soil against Serbia or France in November.
In Brussels, Belgium's David Goffin (ranked 12 in the world) will be out to embellish his phenomenal record in the competition against 185th ranked John Millman.
However, the duo eased through in the tiebreak and are now closing in on an 18th Davis Cup final for France.
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