Neymar has warned Paris Saint-Germain will have to be at their best if they are to get the better of Manchester United in next week's Champions League match.
PSG are three points behind leaders United and level on points with RB Leipzig heading into their penultimate game of the group stage.
Thomas Tuchel's side are out for revenge against the Red Devils, who beat them 2-1 in their first match of the competition in Paris.
After a disappointing 2-2 draw against Bordeaux on Saturday, though, Neymar has warned they must step up their game when they travel to Old Trafford in midweek.
"We know the importance of the Champions League game on Wednesday," he told Canal+. "This is decisive. We didn't play well against Leipzig (in a 1-0 victory on Tuesday), but we managed to win.
"On Wednesday we are going to try to have our best game, play well, but we need to improve certain details, play more as a team, be more organised, otherwise it is going to be difficult."
Bordeaux took the lead on Saturday after Timothee Pembele's 10th-minute own goal. Neymar would then level from the penalty spot before Moise Kean gave PSG the lead, but Yacine Adli pulled Bordeaux level again in the second half.
"We had a timid match. We managed to score goals, but we lacked certain details," Neymar said of his side's performance.
"We must improve on that, because if not, if it is in the league, it is a league where normally we manage to win a lot of games. If we can’t do that, it is going to be tough in the league as well as in the Champions League.”
The Brazil international was also asked about his thoughts on the passing of former Argentina and Napoli star Diego Maradona.
He replied: "Maradona is a football artist. He was someone very important for football, Maradona represented a lot for sport, the world is crying a lot."
PSG are still top of Ligue 1 after 12 matches, three points ahead of Lille who have a game in hand. Marseille sit a further point behind the reigning champions but have played two matches fewer.