Spain midfielder Xavi Hernandez believes victory against France in Tuesday's World Cup qualifier in Madrid would give the defending champions a great chance of reaching Brazil.
Both La Roja and Les Bleus have a 100% record from their opening two qualifiers, sitting first and second respectively, ahead of Georgia, Finland and Belarus.
And Xavi, 32, feels the game at the Estadio Vicente Calderon is the most pivotal in the group, with the winner giving themselves a great opportunity to top Group I and take the one automatic qualifying spot on offer.
"This is the most important game," Xavi told Mundo Deportivo. "Normally the next game is always the most important, but looking at the group, France are the strongest rival on paper. This is the key game. If we win, we have a 75% chance to be at the World Cup."
Spain eased past France 2-0 in their last meeting - the Euro 2012 quarter final - but the Barcelona man says that things will be more difficult this time around as their opponents, with Didier Deschamps now in charge, will be playing with less pressure.
"It will be a difficult game," he said. "They have a great coach who works very well, good players and, as they have said themselves, nothing to lose.
"In principle, we are the ones under pressure, we are world and European champions. We must continue to show that.
"It is a great game, that you look forward to playing in, even more in the Calderon, where we like to play as the fans are so close."
Pedro Rodriguez was the star in Spain's 4-0 World Cup qualifying win against Belarus on Friday, hitting a hat-trick, and Xavi was especially happy that his Barca team-mate had got the rewards for the effort he has been putting in.
"He is playing and training like a marvel," Xavi said. "He deserved it for what he gives the team, how he pressurises opponents, his intensity, the dynamism he brings. It is a hat-trick that gladdened me as much as him, and he knows that."
Friday's game in Minsk was not shown on Spanish television with no TV station agreeing to pay the price asked by the marketing agency which held the rights - something which Xavi believes was wrong to deny Spain fans a chance to see their team in action.
"It was a pity, for us as well, because we like that our games are seen by our fans, our families, everyone," he said. "Many people have told me that they followed it on the radio. It was a pity, but it is an economic matter and we do not get into that."