Hugo Lloris admits France must improve if they are to beat "a very talented" Netherlands in their next World Cup qualifier on Monday.
The Tottenham goalkeeper played the full 90 minutes as France cruised past Bulgaria 4-1 on Friday, despite initially trailing to a sixth-minute penalty.
However, while boosted by a Kevin Gameiro brace and goals from Dimitri Payet and Antoine Griezmann, Lloris conceded that a similar performance would not guarantee victory against Netherlands.
"For the next game, the level will probably be higher against a very talented team," he said after the Bulgaria win. "They [Netherlands] are rebuilding the team but they have ambitions for this campaign.
"It's a great football nation and it'll be up to us to up our level - what we did tonight won't be enough, we'll have to be more aggressive, more serious.
"But we have to keep doing the same things offensively, keep moving, keep passing. Tonight we've seen very good combinations, the goals came from this. This is very good and we have to keep it."
Netherlands - who failed to qualify for Euro 2016 - have started Group A with a draw with Sweden and a 4-1 triumph over Belarus.